Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab82e2e54b34cb9…

MALICIOUS

PDF

68.0 KB Created: 2021-02-27 22:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 87a9629fefac309ca30547ef51afeebb SHA-1: e90168c1ca1123b7519b435592c0f5161c725cf9 SHA-256: 0ab82e2e54b34cb9a85b26eb684a689d4a44c011d716da6ac500fa7b3e01fd43
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • 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://xajibur.ru/award?keyword=cell+and+molecular+biology+book PDF link annotation
    • https://cdn.sqhk.co/remezebona/gcUFgiV/48827041129.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/5817763.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/52030768985.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/b19fa86.pdfIn PDF document text
    • http://lofomerevudawem.iblogger.org/54792415383.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/old_craftsman_table_saw_motor_repair.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wepebafefik.rf.gd/canon_toolbox_4._9_free.pdfIn PDF document text
    • http://fomupobidep.epizy.com/vozerajovu.pdfIn PDF document text
    • http://mobevawawe.rf.gd/cadria_item_shop_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/takalu.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/dejabimubujawi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/fortnightly_payment_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/how_to_potty_train_3_days.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/dixiw.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_off0000cf06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF06 5292 bytes
SHA-256: 7f048d53d44aeb9942e5d1ad21bc2aa890825b14d05c03b83532bbe8f9939594
font_01_sfnt_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 10044 bytes
SHA-256: f482ea628cbe525a281738553a776de61b9c8cc142971097ee6bf8e9650e6ea3