Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09e857fe338296e…

MALICIOUS

PDF

82.5 KB Created: 2021-05-23 10:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 09216c1f6b5220d87f0a50f35e9777f6 SHA-1: e3f5fcf74fc0117899b03b6a3edfa6e5560e1421 SHA-256: a09e857fe338296e6f2d10bb259a64d47bb3b1eadc9b71d5b0e60d4d7747d911
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier returned a high probability of maliciousness. The document contains a large number of external links, many of which point to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://xezojetit.ru/strik?utm_term=how+to+check+your+airpods+pro+battery+life', is likely a lure to disguise the malicious intent. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://xezojetit.ru/strik?utm_term=how+to+check+your+airpods+pro+battery+life PDF link annotation
    • https://xitodilizunew.weebly.com/uploads/1/3/4/1/134108755/tukanitotowaf-doduratogi.pdfIn PDF document text
    • https://wixuzezokanozav.weebly.com/uploads/1/3/4/6/134663812/kojarugemomepadijeri.pdfIn PDF document text
    • https://niliwuwez.weebly.com/uploads/1/3/4/2/134265541/d06c6983c95338.pdfIn PDF document text
    • https://gigatadozewat.weebly.com/uploads/1/3/1/6/131606492/bavikegabolax.pdfIn PDF document text
    • https://demomejisalazi.weebly.com/uploads/1/3/4/8/134869482/34560fc.pdfIn PDF document text
    • https://rurirenaw.weebly.com/uploads/1/3/4/6/134652156/ragilebesemo_koloxov_nexux.pdfIn PDF document text
    • https://metifavogogebo.weebly.com/uploads/1/3/4/7/134716609/libifetow.pdfIn PDF document text
    • https://fepanaxowa.weebly.com/uploads/1/3/4/3/134311119/wufotakodonawu_vidafozinafuro.pdfIn PDF document text
    • https://xakebugus.weebly.com/uploads/1/3/4/0/134018628/e92f26f5db09f91.pdfIn PDF document text
    • https://sadoxeliwuduw.weebly.com/uploads/1/3/4/0/134040540/d94d94389.pdfIn PDF document text
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/702932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/busutafitufe/would_you_rather_questions_for_kids_holiday.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/balikukoladanojara.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/misudabasuxusasuxilasume.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/ep_booster_vs_super_sweet.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/23697660772.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/catholic_apologetics_101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e93263-13ba-4665-9aa6-14367d3ed83a/why_is_my_tripp_lite_beeping.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/50169580144.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/how_to_start_a_retail_business_in_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a30f03-088e-448b-a478-ba61e8621f84/juzevulurivatefibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0acfae83-926b-4fea-947f-d73efa9168d1/matlab_linspace_vs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e464ff-d6c6-423e-a697-3c07488931d1/69232560839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304b8f96-ac96-4b3a-8446-7a95a368ca5b/dell_e207wfp_driver_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/pet_sematary_2_2019_cast.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 5376 bytes
SHA-256: de06f136cefc4b2f17f7d27873ac6349f6b3face52fbf50a0de570c83b0c2786
font_01_sfnt_off0001068d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 11028 bytes
SHA-256: 841eef3abcb52c41bfadcce086554d9b8c57ae5d8f386fa355f57ccad8b05779
font_02_sfnt_off00012c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C15 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176