Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b8138c1f6bcb7f…

MALICIOUS

PDF

73.3 KB Created: 2021-04-07 13:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 044fbad509d911ef3efbc9e94ca37ccc SHA-1: 70486e143715ea2cb049d88989311e88eeac8ca4 SHA-256: 98b8138c1f6bcb7f650590a8f40cbdf55a24ee0291b247178c6ce1e98c89996b
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized content, suggesting a link farm or phishing lure. One prominent link, 'https://golowaki.ru/strik?utm_term=average+salary+of+engineer+in+michigan', is identified as an SEO redirector, likely leading to a malicious site. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6788

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://golowaki.ru/strik?utm_term=average+salary+of+engineer+in+michigan PDF link annotation
    • https://cdn.sqhk.co/pigajifaw/vInigij/communist_flag_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/ql2jrhb/kigokeker.pdfIn PDF document text
    • https://ladebixere.weebly.com/uploads/1/3/4/3/134318604/naxikubirexojojileji.pdfIn PDF document text
    • https://winetokazujubap.weebly.com/uploads/1/3/4/3/134321452/sokenoluk_benajibufaz_gataguwomivo_memupimavipa.pdfIn PDF document text
    • https://woxolifufoku.weebly.com/uploads/1/3/4/2/134234665/zesitajogajosadedus.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/fxfjihU/mamus.pdfIn PDF document text
    • https://galezarulunozip.weebly.com/uploads/1/3/4/8/134896955/vevorupijosaruve.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/v8hidgj/pixel_gunner_unlimited_money.pdfIn PDF document text
    • https://rekinijibir.weebly.com/uploads/1/3/2/3/132302710/xovuveja.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/dijyjh2/calendario_serie_a_2018_19_juventus.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/jqhbgeZ/88491764038.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/fasudikek/z_for_zachariah_chapter_12_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/21714436525.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/equalizer_bass_booster_pro_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/18237220465.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/dymo_letratag_qx50_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/avira_antivirus_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/brackets_j_cole.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/xasazuxeremonirafotava.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/how_to_make_wood_corner_joints.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/86133672618.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/me_before_you_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/potetimisum.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/how_does_charcoal_pull_out_blackheads.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 5444 bytes
SHA-256: 0a109ffa5c270fbc5f3b20cf0f3503291834c3a61314348fb61abc37e6cc6d68
font_01_sfnt_off00010478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 10656 bytes
SHA-256: 47052fbe5bf20db53374d22e39d16ce5b1689c11b4bf984f9a531fd56ce95bc9

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