Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8214c0e75ee52bf…

MALICIOUS

PDF

82.1 KB Created: 2021-06-07 08:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1eede39c48d2818bea5b856fada5f0f SHA-1: deba71a27f079f9da561e1ac76e47f198e0bdd69 SHA-256: a8214c0e75ee52bf1f1f9942ee46eb0ceb2b4c247005219b0c1707c40d4d75ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://allytemp.ru/pbw?utm_term=can+you+eat+potatoes+on+the+fast+800+diet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383156/normal_6011b53e865e0.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/70043ab2ab3ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419654/normal_6037762a73b71.pdfIn PDF document text
    • https://geguromivakof.weebly.com/uploads/1/3/4/3/134332909/dotavirodefapufukaj.pdfIn PDF document text
    • https://minezutoka.weebly.com/uploads/1/3/2/6/132695516/biseviwuteberuzavupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_60353f14d6d05.pdfIn PDF document text
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/xusogosogevazomijef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fef0b50a0486.pdfIn PDF document text
    • https://ninibukakogim.weebly.com/uploads/1/3/2/8/132815385/zosonarajurak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fd3d6e341059.pdfIn PDF document text
    • https://sagekafota.weebly.com/uploads/1/3/4/3/134351395/8171922.pdfIn PDF document text
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/pozabajot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416149/normal_5fdfc7b18d6ae.pdfIn PDF document text
    • https://vetidemilutuzu.weebly.com/uploads/1/3/4/4/134492936/xezivivomaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_6019de3c9975f.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
    • http://visetululiv.pbworks.com/w/file/fetch/144422331/can_a_washing_machine_timer_be_repaired.pdfIn PDF document text
    • http://nigezid.pbworks.com/w/file/fetch/144590559/tijimebulekaxegixe.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/f/govitujuj.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/63819429829.pdfIn PDF document text
    • http://tosuvop.pbworks.com/f/how_to_change_the_loft_on_cobra_f6_driver.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/w/file/fetch/144769476/comment_diviser_un_nombre_entier_par_10_100_ou_1000.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144615633/menotoxumesafozuzig.pdfIn PDF document text
    • http://doxawadar.pbworks.com/f/95778917586.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 5344 bytes
SHA-256: da1b3b87d7a9530c30b0e0f8b6a36b458412ea0fcfc7c7d712d60389d7b94acb
font_01_sfnt_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 10784 bytes
SHA-256: 192447f2ff498b34cec522b09f471aadc917877a4601e2999f05c4d300d0f76b
font_02_sfnt_off00012cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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