Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26ff984e71c06c5…

MALICIOUS

PDF

76.7 KB Created: 2021-03-19 07:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a952d63f485505c68ce153c6a3c4dd91 SHA-1: 45e3e12b0d14050368e7c440c0a5d3ee3b40753c SHA-256: e26ff984e71c06c51b2567e9c64cd23478f496d42bf2c517c0663b69e1d12aff
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://zajinet.ru/award?keyword=como+pasar+de+pdf+a+word+sin+programas', is presented as a tool to convert PDF to Word, likely a lure to a malicious website. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of malicious intent, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/award?keyword=como+pasar+de+pdf+a+word+sin+programas PDF link annotation
    • https://tekuxarutupun.weebly.com/uploads/1/3/0/7/130775258/fenowarutasunedojibi.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/8157149.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/chAgj46/amtrak_map_east_coast.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/ibjghan/72151468029.pdfIn PDF document text
    • https://cdn.sqhk.co/wolonevavaru/hhpggsg/xowabade.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/xedadijaka_kudalivuxo.pdfIn PDF document text
    • https://fekazivijiwawad.weebly.com/uploads/1/3/4/6/134687088/durojajaxa.pdfIn PDF document text
    • https://kezopepeza.weebly.com/uploads/1/3/4/3/134332650/nibofojebatek.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/bogijexu/samsung_galaxy_note_3_launch_date.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/never_forget_you_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/49232893876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b17aaa-8a67-493c-a38b-16c709f7731c/75275133538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7547ed93-e58d-4d63-961b-63421bd93209/how_to_calculate_volume_of_a_cube_in_litres.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/butejawub.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/meal_prep_guide_for_bulking.pdfIn PDF document text
    • https://19d8af67-ac20-4a7c-8ffd-69be953788a8.filesusr.com/ugd/578741_41658c05027c4cb18370842d243527db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/62559418610.pdfIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_60be1e3b87ab4396abbe7bdb6909135f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/how_to_make_animations_on_your_computer_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/nonojokizixadefetuli.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_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 5328 bytes
SHA-256: 02bef796564266d30bc38cb189e639dcc08d31560c133ed153a52efa504c3a22
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 11764 bytes
SHA-256: 59ec28d567d342de5b589afcba04dc5daa150a0fce74c934a6f96b3e73ee1251

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