Malicious PDF — malware analysis report

Static analysis result for SHA-256 9892e3a0d2b91451…

MALICIOUS

PDF

77.6 KB Created: 2021-03-28 01:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c11310f074203843e88d60a835d4c59a SHA-1: b175d8ba264747cf4a43730bf44c641a53931fb7 SHA-256: 9892e3a0d2b914518f34b2d95c5ef164e71e8b2378dd6c7562328307a906b917
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=craftsman+electric+edger+parts PDF link annotation
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/4897925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483103/normal_5fcb1ef78ff0b.pdfIn PDF document text
    • https://cdn.sqhk.co/bogonelemid/w1v5ibZ/hidden_empire_film_group_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_604d402c2cd32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408589/normal_5fecf2f46c5f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_605faf1f16d35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_602b6d938034e.pdfIn PDF document text
    • https://zunotexiru.weebly.com/uploads/1/3/4/8/134890048/b4977a5cb6121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_605a2ef8a6698.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/jdaI0MC/free_tv_shows_app_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454824/normal_5fc959a2c393a.pdfIn PDF document text
    • https://sesuzefodapu.weebly.com/uploads/1/3/2/8/132815176/basilebik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423780/normal_5feb36fbebb16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368244/normal_5ff0214427da8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418166/normal_5fc67ac8c6768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_601189e370db0.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/31916856b6.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/fojige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462976/normal_5fd056f3db2f5.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/3ab69286-c98d-4b96-8001-84e8e8caddea/david_lay_algebra_lineal_y_sus_aplicaciones_4ta_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3d0ad2-58af-454b-bcb8-868fe02b79ed/rileremusif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73aed1c-b6a7-4608-b9bc-edbc6aa19188/dell_inspiron_n5010_ram_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b48b8eb-b89a-441c-963f-156d357a8fd4/how_to_write_a_memo_to_the_board_of_directors.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 5380 bytes
SHA-256: 5a28ee93181c953f0f14a35e3e4ce7452360ae327c5472a2c5a7dee79d54ebcb
font_01_sfnt_off000106a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 10120 bytes
SHA-256: 1582d104ce14fd0a136ee104c5b37cbd1733161e3992b8d1f5e35467e60279a7

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