Malicious PDF — malware analysis report

Static analysis result for SHA-256 77118cc0de409908…

MALICIOUS

PDF

91.8 KB Created: 2021-03-19 11:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04075a2c4b2009e5ee41e4d9bd1a1c44 SHA-1: 0e46e74e7263f17ba50aad54833b53f4262c3717 SHA-256: 77118cc0de409908e7d44cac00879074383470eaefe1bc11f081c5d87e471e51
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, suggesting a link farm or phishing attempt, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a search query related to 'fallout 4 mods', likely a lure to disguise malicious intent. ClamAV detection and ML classification confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/wb?keyword=fun%20fallout%204%20mods%20xbox%20one PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423430/normal_60327b8c0e168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5ffba7df72bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467286/normal_5fcd5fff36943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_60514624e22a5.pdfIn PDF document text
    • http://kulokozataxat.22web.org/simeginutofibipe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402261/normal_5fe5902b63e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_6016f803ad2fd.pdfIn PDF document text
    • http://xexufonek.iblogger.org/cervical_cancer_screening_guidelines_2017_algorithm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_6019cc7f0e344.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokamusosimabo.rf.gd/fifty_shades_of_grey_full_story_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/99580046913.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_a35687c2914c405cbb3b541eca2be4ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wolawatin/87335583085.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_feac092e91be43e68bea92bd5a7671c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/kedipigatelap.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/sozibejixofobomoz.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/4864166568.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/hakikat_ilmu_pendidikan_islam.pdfIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_534e78633e3541599296af975d69b530.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/86172383630.pdfIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_10e675f33b8d40a2a19e994f08bf9757.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejideba/63905612379.pdfIn PDF document text
    • http://lojogonofar.rf.gd/wotupi.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_off00012c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C85 5208 bytes
SHA-256: 0ab3560fb6363500b29922558f37f7c1b08f8a813626b9200009d3704c9de4b5
font_01_sfnt_off00013e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E39 10556 bytes
SHA-256: 05ee6b4a9a9a1a8ae04fdd62a281a7c24e12e84e90697f3a45c0e7e00ce6391a

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