Malicious PDF — malware analysis report

Static analysis result for SHA-256 051ffd2879852aba…

MALICIOUS

PDF

85.0 KB Created: 2021-03-31 09:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 769d0bbdd36964d5ab03a8d15ba52eff SHA-1: 7b00c928a989adcf2a8ea08572994110551212e4 SHA-256: 051ffd2879852abaf1c7cfc3bc6bd4dbc85f81b506c78eb2cb2f0eae32506463
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, characteristic of a link farm or SEO spam campaign, designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=american+pageant+11th+edition+online
    • https://kususeni.weebly.com/uploads/1/3/2/7/132740764/3a2c4fd217b4.pdf
    • https://sipusojatavajuw.weebly.com/uploads/1/3/4/6/134606658/nimizabemifetan-nekewizes-relavukurun.pdf
    • https://wipasajumavadus.weebly.com/uploads/1/3/4/7/134775966/zixusu.pdf
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/7c23e6faa0.pdf
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/miwegedu.pdf
    • https://cdn.sqhk.co/luveruzosu/bqjigge/odd_eyes_rebellion_dragon_overlord_espanol.pdf
    • https://fagezatev.weebly.com/uploads/1/3/4/7/134711774/9661296.pdf
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/4803267.pdf
    • http://nemosixumeki.mypressonline.com/apc_smart-ups_c_1500va_lcd_ups_-_900w_-_1500va_smc1500.pdf
    • https://cdn.sqhk.co/fimegasaz/6Mwgjja/the_wolf_among_us_bigby_x_fable_reader.pdf
    • https://cdn.sqhk.co/zapiseniw/hggcljL/bibarutusotup.pdf
    • http://tamogulaganero.scienceontheweb.net/difference_between_binomial_vs_cdf.pdf
    • https://megulotajisotem.weebly.com/uploads/1/3/4/5/134592592/rarinedijolifaf_xagaxus.pdf
    • https://cdn.sqhk.co/mopewedote/jiZzPig/rawafijogawogul.pdf
    • https://tasitonedilegu.weebly.com/uploads/1/3/5/3/135301248/suneb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zemigiduwagafu/wiluvemu.pdf
    • https://s3.amazonaws.com/wewiro/82236866247.pdf
    • https://s3.amazonaws.com/jinabom/nanda_nursing_diagnosis_list.pdf
    • https://s3.amazonaws.com/fifomi/torinotikegixasinu.pdf
    • https://s3.amazonaws.com/bededuxotulapil/zuserutovagewelebi.pdf
    • https://s3.amazonaws.com/vebisop/jefew.pdf
    • https://s3.amazonaws.com/rewepalazamiso/cyborg_full_movie_dual_audio.pdf
    • http://pezefaxovojole.atwebpages.com/40116727009.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f63.bin
a45d90a296a091e0087395c30df4b30450aa05b0319f062e6b809880d5952c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F63 5352 bytes
font_01_sfnt_off0001216e.bin
ce95f970cdcf81c6fdfa61f95bc6e91cf2bb8e428332612cd745d14b6875650b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216E 10360 bytes

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