Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce45faa0bd9717c…

MALICIOUS

PDF

82.3 KB Created: 2021-03-10 02:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7cae36e45a7b5a48ebc4f0106650cd71 SHA-1: b915f7c7d6e360d6f46beee198a00240dbb17996 SHA-256: 5ce45faa0bd9717c67f6802e5ee3f589eac0212d1bb8912b45e2e457db1c144c
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'Airplay speakers android app' and metadata indicating it was generated by wkhtmltopdf, which can be used to create malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=airplay+speakers+android+app PDF link annotation
    • https://siragakepog.weebly.com/uploads/1/3/4/8/134890789/xogegevi.pdfIn PDF document text
    • https://jozisanolotodix.weebly.com/uploads/1/3/0/9/130969335/806b0473b5ca.pdfIn PDF document text
    • https://kototavuwo.weebly.com/uploads/1/3/4/6/134696015/kuwuguzog-jojixilejagib-duridobinik.pdfIn PDF document text
    • http://persequenteamsohbet.com/vexekimelidawubogez0p75y.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/ia3oiZD/mulololu.pdfIn PDF document text
    • https://mubafuzolifuben.weebly.com/uploads/1/3/4/6/134644730/jagujizetud.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/Rl9JieT/95879136313.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/6Ohf7hg/pepubekalixi.pdfIn PDF document text
    • http://redit.fun/52090607363bqfw3.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/hbjfYQi/dancing_hop_tiles_ball_edm_rush.pdfIn PDF document text
    • http://kirudoxidezogu.22web.org/bukusibanaweberokosopid.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/YMvmehj/99542470304.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/php_basics_free_downloadlxuox.pdfIn PDF document text
    • http://arthromedshop.xyz/deb_to_ipa6kvv6.pdfIn PDF document text
    • http://sks-expertiza.ru/catalogue_yvert_tellier_gratuitnyw5o.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/solodejatodoxi.pdfIn PDF document text
    • http://zesonel.22web.org/76006513586.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/A9Zgkhh/16006273182.pdfIn PDF document text
    • http://movoxazukum.22web.org/superdry_jacket_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/0g1gdBy/85823688048.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/rk4k2gd/voice_of_darth_vader_original.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/D2XhgfP/zipaxani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_0d8690b49e644457927f1f2017591917.pdf?index=trueIn PDF document text
    • http://mesesoriran.epizy.com/the_damned_human_race_theme.pdfIn PDF document text
    • http://nejovafejasujob.rf.gd/angielski_tumaczenie_zda.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_7d3c1e5fd7f34084b23e1d8b1e180db6.pdf?index=trueIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_01e9e3fbb6cc4b7788f756692fe5f34e.pdf?index=trueIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_c47d8e7ddca94a498be7817cd4193a39.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 4816 bytes
SHA-256: a0c79db9f1a62c17656f3571b453115fb1f86f1d4da734b5b9d3f87e23ad4bef
font_01_sfnt_off0001072a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072A 11220 bytes
SHA-256: 0df4273940eab6d2d7cb1bd8ef93378e208fc744979ee45de4edef386efd0b98
font_02_sfnt_off00012d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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