Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f4635c64aeb871…

MALICIOUS

PDF

70.6 KB Created: 2021-03-09 09:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 98cf168dc460b64211152ac8ede64f74 SHA-1: 4352566f7e4817eda495e9e111e90eda09703ace SHA-256: 01f4635c64aeb8718f0be5315a279a46271e65eaca2b0ca9ec086b178ab5649b
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://yafferge.ru/wix?keyword=nine+lives+to+die+pdf+download In PDF document text
    • http://supportcopyright.net/kiwusaxibuvopodakukolrnr0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_601dfc175c05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_600c032222fdd.pdfIn PDF document text
    • http://mebelrostov.ru/down_the_rabbit_hole_morgan_freemanhxs66.pdfIn PDF document text
    • http://julaximufe.66ghz.com/goalkeeper_training_drills.pdfIn PDF document text
    • http://instasurprise.online/the_argonauts_maggie_nelson_excerpt6twp1.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/bisazabe/ayat_kursi_image.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/48736121140.pdfIn PDF document text
    • http://bapibalapu.rf.gd/73539450377.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/28474473112.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/72927285725.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_11e2bedbc9ca406492c00e4cd5159d73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taturi/mefazajogumebafarum.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_688e45e1292b4b43a5be5d6dcf6afc5a.pdf?index=trueIn PDF document text
    • http://pinezininefos.epizy.com/argox_os-_214_plus_software.pdfIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_b83eba1815b448afbf257b53b37daba5.pdf?index=trueIn 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_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 5060 bytes
SHA-256: c346766a8a3a0ceb6818e2fd95d72c6e57a1d7f2b7540cea48b3e1815c630ffb
font_01_sfnt_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 10148 bytes
SHA-256: 9b2142edc43497f20ede6679df22b420e899138712debc6bacc3c50c06fbe992

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