Malicious PDF — malware analysis report

Static analysis result for SHA-256 852a58fb5c3f7dff…

MALICIOUS

PDF

79.9 KB Created: 2021-03-21 07:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: eee31c028e4f21834369757ca09898ee SHA-1: 402b6a293c1fa27f03db1249e238f21fed9217c8 SHA-256: 852a58fb5c3f7dff508a30b20db62fe93266dc3d3fbf4f226c2f4f2bce4eb16e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm operation. It contains numerous external links, including one pointing to 'zajinet.ru' disguised as a 'Neopets stats guide', likely to manipulate search engine rankings or redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to host or link to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://zajinet.ru/wix?keyword=neopets+stats+guide PDF link annotation
    • http://wotasabe.22web.org/stihl_concrete_saw_ts400_manual.pdfIn PDF document text
    • http://dabuxupufudina.22web.org/wifi_hack_wpa_android_app.pdfIn PDF document text
    • https://vimikova.weebly.com/uploads/1/3/1/4/131437612/4252424393393.pdfIn PDF document text
    • http://nofovukad.iblogger.org/72081112564.pdfIn PDF document text
    • https://ruwiwiteviporiz.weebly.com/uploads/1/3/4/7/134767377/pefabunew.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/zoxiwekukasate.pdfIn PDF document text
    • http://menetufebev.22web.org/12019665242.pdfIn PDF document text
    • http://zowisofefo.iblogger.org/tatode.pdfIn PDF document text
    • http://todibojoposufu.iblogger.org/sunbeam_heated_throw_replacement_cord_aa85.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/fanigidekix_towatiduda.pdfIn PDF document text
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/gomox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/safago/tepikijavegikobagem.pdfIn PDF document text
    • http://guvawegudisow.epizy.com/certificate_of_employment_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/fokovezisozusuvafe.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/79575139116.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_4221d03f731442c0bc5cd044610ddb61.pdf?index=trueIn PDF document text
    • http://wupubobetob.epizy.com/vba_application._worksheetfunction._vlookup_error_1004.pdfIn PDF document text
    • http://xetorofowuwid.epizy.com/vofujibitos.pdfIn PDF document text
    • http://fazetotunoju.epizy.com/58097804347.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/mejubidub.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/ilive_sound_bar_pairing_code_dish_network.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_814e1c646f184fa8adbfc791c3bc7639.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lazesej/the_good_girl_2004_movie_online.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_5fab522006c6450a8e55ab65789eccda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 4968 bytes
SHA-256: 6b77de8757bb5e93dab473e09363de7d427e09d680ca35d22c4bd55128dc472a
font_01_sfnt_off00010deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEB 10640 bytes
SHA-256: 3e9fe651390b03c2c90da21101b97dc9458d5fbe2a7d199087c75d02dd0a226a

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