Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afac8a961946268…

MALICIOUS

PDF

75.9 KB Created: 2021-03-22 10:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 756c2af58f28593af0aec8b14d8e643b SHA-1: 6db30ae49fd52f4a8a880fc399c8b1a9a4f564c9 SHA-256: 7afac8a961946268da9aabd6ab3ce19373d4764f51a70ca5e5d1e65af633a83c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on suspicious domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/aws?utm_term=samsung+galaxy+tab+2+7.0+gt-p3113+custom+rom PDF link annotation
    • https://cdn.sqhk.co/zutijujes/3zbgghb/jojopuxafizivilamobikod.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/c4b6a8febec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495839/normal_5fca2e186b8ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449615/normal_5fcd4386f3749.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzijaxab/J5LhaRM/fijexufofigigem.pdfIn PDF document text
    • https://bigimegena.weebly.com/uploads/1/3/1/4/131438437/xomavetoj.pdfIn PDF document text
    • https://xakebugus.weebly.com/uploads/1/3/4/0/134018628/zevifasok_zevoteda_wajidapowem_sujekunaxi.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/f4a512f301c3ca4.pdfIn PDF document text
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/2b866ea.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jixiegf/45109541918.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/alice_in_wonderland_children_s_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/bodixiwapikapowasoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1045f1d4-29c8-4f52-a66e-c1f264de3199/sakuxar.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/nekorefakaguxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb414c59-a83f-4597-8432-1faeed836860/51752936461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa117a8-e130-414e-a378-fe4ecf2da75d/the_interior_castle_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/7_badass_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/the_adventures_of_tom_sawyer_summary_short.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_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 6300 bytes
SHA-256: 67bbba0f9d80186df4c5645579dfd156e0d70daea385796bd2d3676a75d5ef11
font_01_sfnt_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 10892 bytes
SHA-256: 77cc3151b8228102f7273cf62dd78c18021420ef6f1b46c2e1caae42bfec7372

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