Malicious PDF — malware analysis report

Static analysis result for SHA-256 982bd71048e80937…

MALICIOUS

PDF

90.9 KB Created: 2021-02-11 03:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3868eb90e36592d3b7e4ed19f3f5bd26 SHA-1: 5ed19e354aa2f78cd4f7a2bfa4945f1746ef0c17 SHA-256: 982bd71048e80937b146abf33353264569144f2a36acd491bd05f0678af11239
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to be related to a "Lannister family tree season 3" search query, which is likely a lure to drive traffic to these external sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/123?utm_term=lannister+family+tree+season+3 PDF link annotation
    • https://cdn.sqhk.co/fematixub/ridjajg/gabojitafefisikuwadow.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/yEliajL/vemofidozomowolabusi.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/8592434.pdfIn PDF document text
    • http://xogakijukutikep.22web.org/basadanekareguduwuxu.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/vuwutimeladoba_gulusifude_wovazanorenezu_takuvana.pdfIn PDF document text
    • http://mowewuwopirot.iblogger.org/silver_birch_spirit_guide_quotes.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/7814a.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/gghdfzx/zasabufizunajetiw.pdfIn PDF document text
    • https://vonekinorosasox.weebly.com/uploads/1/3/4/7/134732286/4620806.pdfIn PDF document text
    • http://storefromit.pro/the_dark_knight_joker_wallpaper_downloadmkyvu.pdfIn PDF document text
    • https://panejukirid.weebly.com/uploads/1/3/1/6/131606092/287c14c92c469d.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/sezuze_pefogirubalone_gotadovijutisew.pdfIn PDF document text
    • http://shopyou.online/76943807569n1z8c.pdfIn PDF document text
    • http://subaxidubuju.22web.org/59036935510.pdfIn PDF document text
    • https://fokinovev.weebly.com/uploads/1/3/0/7/130775288/lopidusun.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/FCdjgif/wokiragidevijor.pdfIn PDF document text
    • http://groby-ritual.online/90924815832hf4xx.pdfIn PDF document text
    • https://jimutovila.weebly.com/uploads/1/3/1/8/131856698/gojidizabeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugupodat.epizy.com/chocolate_video_song_free.pdfIn PDF document text
    • http://lawubipala.epizy.com/fintrac_guidelines_1-_2_3_5.pdfIn PDF document text
    • http://rajuleneto.epizy.com/sofunav.pdfIn PDF document text
    • http://gewopebij.epizy.com/aa_bridging_the_gap_forms.pdfIn PDF document text
    • http://gavojomizam.epizy.com/panema.pdfIn PDF document text
    • http://lemopuzawematex.rf.gd/54296000033.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_off00012522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12522 5120 bytes
SHA-256: 3f61c3a76244ae3ba87eadc18dd4a501d80c5da020fed17ae29fb5aa3f51edac
font_01_sfnt_off00013687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13687 11544 bytes
SHA-256: c79b91ab48a0aa75865f05e82cae37cccd982c0e6cc6cd6d5a1f59e295f0918b