Malicious PDF — malware analysis report

Static analysis result for SHA-256 587449fb34e95114…

MALICIOUS

PDF

77.5 KB Created: 2021-03-22 06:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 387708c36d8643b54992639822f5ad6d SHA-1: 79cc647c21122f1b2cac3a319009d05909fd0587 SHA-256: 587449fb34e951145e98e9fd7cb3e5db4dfd0e70d455c514a261362af0308af3
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many of which point to unrelated content, suggesting a link farm or SEO poisoning tactic. The embedded URLs likely serve as entry points to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=how+to+set+tub+clean+on+lg+washer
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/5786397.pdf
    • http://metazoaapc.fun/can_you_connect_an_iphone_to_a_mini_projector0935d.pdf
    • https://cdn.sqhk.co/baxorurifina/hhrjcje/gnomes_garden_2_achievement_guide.pdf
    • https://cdn.sqhk.co/sevimifogu/ibWgfUO/bemiwolekisabowukin.pdf
    • https://cdn.sqhk.co/dibitarebizu/kkjiRgd/25842828259.pdf
    • https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/c8081cfa4.pdf
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/papatoraj_xakukopedikuvo_fuvedobiwiluri.pdf
    • http://gloslides.com/goresoaa15.pdf
    • https://pigiwikabulate.weebly.com/uploads/1/3/1/8/131856715/1da7b8bbbc87.pdf
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/8577522.pdf
    • https://cdn.sqhk.co/gixedomawa/LFPjgkZ/dolofesimejelabivubix.pdf
    • http://bet-info.ru/vubusz0tqs.pdf
    • https://cdn.sqhk.co/miraroki/iepSLgi/jeni_s_ice_cream_delivery_los_angeles.pdf
    • http://uspehdnyaaxyz.xyz/usps_how_long_after_customs_clearancev9csc.pdf
    • https://vamepaxokuwi.weebly.com/uploads/1/3/5/9/135959455/1857180.pdf
    • https://cdn.sqhk.co/bitizulokiva/hiFuNid/fibum.pdf
    • https://cdn.sqhk.co/dubagojovo/gidrAyR/jijepagoja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nemafu/fesakoxo.pdf
    • https://s3.amazonaws.com/sitok/mokufepirejipenemilesoris.pdf
    • https://s3.amazonaws.com/loneminovu/redemption_song_bob_marley__the_wailers.pdf
    • https://s3.amazonaws.com/mexesazaxasa/does_dollar_general_pay_holiday_pay_for_new_years_day.pdf
    • https://s3.amazonaws.com/gidibesuxi/hearthstone_arena_guide_boomsday.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_off0000ef50.bin
980f881795885d29d0def34a9beac146bf3c366a8590f18245cb7c320d1b66b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF50 5252 bytes
font_01_sfnt_off00010137.bin
a656026b30597c48ae5e52ce43d14e0ed4b4a98747c3d19eadd1424b3f5df2d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10137 11424 bytes

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