Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec794e45da6b0f3f…

MALICIOUS

PDF

73.8 KB Created: 2021-03-23 13:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 107e66b2b15c9f87d0f08847834b8f81 SHA-1: b5403a4e3ca7b2de24b8376018ce77d5682aed77 SHA-256: ec794e45da6b0f3fa389cd0fdbfcffc87494a21f890d5c3e6a854849c0f19669
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'church history in plain language free pdf', likely to trick users into clicking embedded links that lead to further malicious content or downloads. The presence of multiple disposable domains and link farms indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/wix?keyword=church+history+in+plain+language+free+pdf PDF link annotation
    • http://instapriz.website/suzosatekarojufakepuguz8rjvn.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/cgjvhaA/75151888603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382949/normal_601baf7236460.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/gfhdxjc/colors_in_french_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5fe4238c5195a.pdfIn PDF document text
    • https://reralifinopu.weebly.com/uploads/1/3/4/0/134018386/jakafosijagitoz.pdfIn PDF document text
    • https://tuxupurevulivi.weebly.com/uploads/1/3/0/8/130813143/wizavunas_jorif_gudozon.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/tokesalo-motezaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fe84e37793dc.pdfIn PDF document text
    • http://keepxufi.space/233857053015isla.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/82243590484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_604cdd0baed22.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/sixinigaxe.pdfIn PDF document text
    • http://want-seo.ru/hd_cinema_app_for_androidvpe31.pdfIn PDF document text
    • https://jumalevejuza.weebly.com/uploads/1/3/4/6/134690248/fc8b64153c.pdfIn PDF document text
    • https://cdn.sqhk.co/zepaginu/jgjhicd/accuracy_and_precision_chemistry_worksheet.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/vegan_monster_protein_review.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/oibFKjc/259293621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_5fd63d013c141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodumenijos.epizy.com/static_and_dynamic_memory_allocation_in_c.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/21883392102.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/economy_banking_and_finance.pdfIn PDF document text
    • http://rudabenikojor.epizy.com/55341763039.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE133 5424 bytes
SHA-256: d13b460f0ec5c7fdd359efdc8823914eb813dd6d207b5e1ad9b0c5474b2701ba
font_01_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 11660 bytes
SHA-256: dc95363e7f5252dec5dacd3588b1c4319507182d9951c8b1f6cfab5f9970d941

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