Malicious PDF — malware analysis report

Static analysis result for SHA-256 7883f18921755650…

MALICIOUS

PDF

68.8 KB Created: 2021-01-05 21:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c66848b6720b0bdcee35cdd8a6da5eaf SHA-1: 31ad17d55e752858560a17d0877febf343765ab5 SHA-256: 7883f189217556509cdc6be016ab24c7207f2545e8a2ae858552e8abf84949d8
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 0.9998

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://trafftec.ru/aws?utm_term=activity+theory+pdf PDF link annotation
    • https://cdn.sqhk.co/vobilurerire/mv2iahe/microsoft_sharepoint_designer_2010.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/ghggfgd/pogotelojiwevig.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/idgiUjd/munevawuzever.pdfIn PDF document text
    • https://sojomirolasa.weebly.com/uploads/1/3/4/3/134325131/duxozamenom_bojogavewuv_budilodoxugoz.pdfIn PDF document text
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/suvef.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/ifxiijb/helicopter_price_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/ygcijjd/carry_on_mr_bowditch_audiobook.pdfIn PDF document text
    • https://cdn.sqhk.co/lozukoxokir/eZYidic/gun_strike_shoot_mod_apk_download_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/0hjbSg6/92824203524.pdfIn PDF document text
    • https://tobosuxonekid.weebly.com/uploads/1/3/4/4/134493818/talilevesirujugin.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/8bed7aa7-1c3a-49cb-b4be-1d7dae69cac9/biviwudunoparapinalasok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f9e193-cb83-457b-95bc-7f4e79be9266/53188340305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae5e1dd-fb19-4bc9-ab39-25c8908f0f98/zodizomuxozevulewinigik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f60f449-b8c7-4257-86e0-16511841fe73/bharya_athra_pora_full_movie_free_download.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_off0000d4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B6 4976 bytes
SHA-256: c3553ed2c48111c75f0a3dceea66823167c7a10501ac0148bc13dd0b251fd6dd
font_01_sfnt_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 9576 bytes
SHA-256: f8dff91ce6631ab3b09de7248f383a8bc57adfc38b52633c45f0da9e765f37f8

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