Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8db1ef0ce79757…

MALICIOUS

PDF

93.2 KB Created: 2021-05-22 19:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2189325922d3ceb1f7c7e5a4551a15a3 SHA-1: 3c33f06bc00f1fbf218768494d8f29c0c96d69c0 SHA-256: 0a8db1ef0ce79757106bea8adcb218a2a35c6f74646383b0d5a9693d10f9fd26
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. One of the embedded URLs, https://maypoin.ru/strik?utm_term=how+do+i+set+the+day+on+my+timex+indiglo+watch, is likely part of this malicious infrastructure. No scripts were extracted, but the PDF structure itself is indicative of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/strik?utm_term=how+do+i+set+the+day+on+my+timex+indiglo+watch PDF link annotation
    • https://buzowupe.weebly.com/uploads/1/3/1/4/131483044/damabepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485591/normal_601e7eb00810e.pdfIn PDF document text
    • https://wukubikowifetu.weebly.com/uploads/1/3/4/7/134725801/lesug.pdfIn PDF document text
    • https://dawerofe.weebly.com/uploads/1/3/4/3/134361643/7915886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_6041f89b96fe8.pdfIn PDF document text
    • https://zasipirowi.weebly.com/uploads/1/3/4/2/134266189/relinilat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425491/normal_603cb1e4628f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_603b5ab0cdc4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_6069d2755834a.pdfIn PDF document text
    • https://foreguguwikib.weebly.com/uploads/1/3/0/7/130775698/gixanatupadezelev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407749/normal_600728c210fdb.pdfIn PDF document text
    • https://dofabogadu.weebly.com/uploads/1/3/0/7/130739956/31ec8.pdfIn PDF document text
    • https://fifofisepag.weebly.com/uploads/1/3/5/9/135985139/redafixuwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406191/normal_6002d08074f1b.pdfIn PDF document text
    • https://tepojaja.weebly.com/uploads/1/3/5/9/135966759/sitizeje_xuzibumefu_rapagovoxok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4615ee-a856-4e22-b4dc-9e68f0230141/zukobojasoraneluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd65ccc7-005a-4bbc-a8cb-7edbf369930b/intermediate_microeconomics_and_its_application_book_only.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ff3bd8-157e-48be-b195-845891903617/fifty_shades_of_grey_dvd_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42621e59-e83d-4022-84f6-f145ee28eb20/roxewokemojinutavapiredo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608efb54-3058-498b-b8cf-5a5fe772172a/how_old_was_mr_darcy_in_pride_and_prejudice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097b8520-1f2c-48b7-a5a2-16b3562a5fec/plantronics_voyager_5200_uc_best_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7231144e-7a84-48f9-8e25-8bb5c245db39/a_christmas_story_cast_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edc354d-604d-4558-8e62-c03871247017/94314684178.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE004 6416 bytes
SHA-256: 9e91590ae502ff902ba306624a00c8d44396a7ee9717b1bfa1717db63fe08483
font_01_sfnt_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5480 bytes
SHA-256: aaf5098a79578ad24de5b2159fe9a75be0c5b446bd3e0b73cbaebd0b2d447037
font_02_sfnt_off0001026e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 10696 bytes
SHA-256: 2566fb9a71b4ed20216d002fdfdb7fe7799f472c08c3cbc9c903aafd0f8880a9
font_03_sfnt_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 10436 bytes
SHA-256: 364b00287c192c3744f637344326e06c30d30f4aa55810e95643f649078c0acf
font_04_sfnt_off000148b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B2 16256 bytes
SHA-256: 0c28d55d9957e5be45f9d3302843a1d8772fc4e8a9a81ea04eed1b5cc2016f23
font_05_sfnt_off00015e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0F 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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