Malicious PDF — malware analysis report

Static analysis result for SHA-256 371acc5b5cfe29af…

MALICIOUS

PDF

68.1 KB Created: 2021-01-27 22:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 262655fcacadf6f3dd481b1e5d267216 SHA-1: 28aa892f5e59f5e89d94257fc713a0c91d80202f SHA-256: 371acc5b5cfe29afa2ceca371ba0b4e71a261f390b4dfd9b5c4609b43b7c4cbb
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=best%20jump%20rope%20workout%20for%20basketball In PDF document text
    • http://ryursew.space/retro_racing_game_unblocked737b2.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/11843921057hw6hv.pdfIn PDF document text
    • http://verifiedbadges-form.com/botixd851u.pdfIn PDF document text
    • http://flowerport.shop/81011546041jp2ej.pdfIn PDF document text
    • https://nudezodubazez.weebly.com/uploads/1/3/1/1/131164524/5958440.pdfIn PDF document text
    • http://canlisohbetim.net/mendelian_genetics_worksheet_answers_key_agricultural_sciences738w6.pdfIn PDF document text
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/pazivoramexipeb.pdfIn PDF document text
    • http://ita-women.space/vomuvajx0gw8.pdfIn PDF document text
    • https://wumasokur.weebly.com/uploads/1/3/1/3/131384536/0786f311fd6.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/pegozegi/basakititegite.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/60711018220.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/bol_tere_mithe_lage_video.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/gutejizeduguwowipitus.pdfIn PDF document text
    • http://norenebe.rf.gd/contract_termination_agreement_template_alberta.pdfIn PDF document text
    • http://nenilezum.epizy.com/dusk_full_game.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_off0000cbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE6 5468 bytes
SHA-256: 8f30689a3ba1345514b9c62e27adf2b673a729844c672d758656135255785f39
font_01_sfnt_off0000de7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7D 11156 bytes
SHA-256: 3c807ccb7bbb40abac64a8a64ecd84148ecb1677bde549351bdff6dd96d3055a