Malicious PDF — malware analysis report

Static analysis result for SHA-256 218134dfbac8a749…

MALICIOUS

PDF

41.6 KB Created: 2021-02-28 00:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 83f83a870b7aa75f2edf3f1e01d0f636 SHA-1: 3f8e5eff76313b506715b6e501313fc46c5c348e SHA-256: 218134dfbac8a749c800083dfa90a46ed127350f33e8f214d01b21bdbe61011c
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a phishing lure, presenting an image-based "weight loss diet chart" to entice users to click on a link. The linked URL, https://maypoin.ru/aws?utm_term=weight+loss+veg+diet+chart+pdf, likely leads to a malicious site. The presence of malformed streams and the ML classifier's high confidence score further indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7366

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://maypoin.ru/aws?utm_term=weight+loss+veg+diet+chart+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463538/normal_602025c63ef7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_600c541d77e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416506/normal_601d176fad506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_60220589bffde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5fdc2ee524ed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_5fd92dc35fb48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_6019b24b3dfc6.pdfIn PDF document text
    • https://gelejidog.weebly.com/uploads/1/3/4/6/134688201/1070657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_5fdc6c806b2bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382420/normal_5ff2c44eae825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_5fdd31c5cc23f.pdfIn PDF document text
    • https://kefapadasogimok.weebly.com/uploads/1/3/4/6/134601884/25536.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/it_s_a_girl_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/kibojaputivoxikezilorode.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/56399490093.pdfIn PDF document text
    • http://magapupegijovot.epizy.com/falcon_zero_f170_firmware_update.pdfIn PDF document text
    • http://bavajozobe.epizy.com/19423123001.pdfIn PDF document text

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