Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0d95fec805b371…

MALICIOUS

PDF

88.4 KB Created: 2021-03-12 01:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cf7d463499e656c38fc87ba2cab74e40 SHA-1: dcc3bc94dd0bd9fbcb346d6a50cd3963f8edfa36 SHA-256: 2b0d95fec805b371873188d51ab4be3284398bb6d845fd6a68ac8e7bdf547482
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to product usage, likely intended to direct users to malicious sites for further exploitation. The presence of multiple disposable domains and link farm characteristics further supports a phishing or malware distribution intent.

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://seumenha.ru/strik?utm_term=how+to+use+a+bushnell+yardage+pro+sport+450 PDF link annotation
    • http://korefubelexusiz.medianewsonline.com/xifimodedawadobi.pdfIn PDF document text
    • https://cdn.sqhk.co/fojizejoxu/gsSQ468/86973160167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460231/normal_5fea14df74317.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/akFidSi/wigovazed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464523/normal_5ffd4de73a938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_601be3acf038a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_6040543e8f182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_5ff8791544925.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/zesusimem.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/how_to_shut_off_ice_maker_on_frigidaire_gallery.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/cjjidgg/hearts_of_iron_4_guide_steam.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/f8jaNrE/private_number_song_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/lokemoxire/i2bRu3i/new_english_song_video_mein.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/73671525528.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/vewivewelutepuda.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/70813434454.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/what_city_is_babylon_today.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/how_do_you_start_a_horror_story.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ecf1b359-4982-44d9-836f-7e6f5fec4aa1.filesusr.com/ugd/da15c8_6a61b4c65cc24dee8c2727903e8757ac.pdf?index=trueIn PDF document text
    • http://xedemigu.atwebpages.com/managerial_accounting_concepts_and_principles.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/83083678095.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_c65955f8757b48f181ea5c37d8ccc250.pdf?index=trueIn PDF document text
    • http://wurebosuloxu.myartsonline.com/10941061143.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_off0001194a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 5872 bytes
SHA-256: 53d796e95d68dec51126de2ba85d5b7e0245f319ab30f841688b856af745193a
font_01_sfnt_off00012d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D58 11420 bytes
SHA-256: bdbaecbf862b8ebf49ce3a0e5ae579e77c3543db2041b13546a8b9a959c715b9

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