Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a3a08e0249cddf…

MALICIOUS

PDF

92.6 KB Created: 2021-03-13 19:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbd0b904eb93b376dcc3237a09669dcc SHA-1: d785d855c6e6f3fbd42ed61bcb45cbecd12c1173 SHA-256: 47a3a08e0249cddfbcec7913fcef2bd0e843ddacc258d7dc1628f76514bf9605
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as book titles, indicating a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via the embedded URLs. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=hero+siege+guide+2018
    • http://pigigozoruda.mypressonline.com/how_to_connect_vizio_sound_bar_to_sub.pdf
    • http://dekiweragaf.mywebcommunity.org/can_you_keep_a_secret_review_movie.pdf
    • https://kefawefixak.weebly.com/uploads/1/3/0/7/130738991/9426464.pdf
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/tuganukodakope_famovagojelu_bedatarabid_fipixe.pdf
    • http://nuxokavarop.22web.org/24554029323.pdf
    • https://winateminapalem.weebly.com/uploads/1/3/4/0/134041456/mekonozuzar_derojoxexivarob_rufipu_pelirawu.pdf
    • http://fibubileb.22web.org/aromatic_compounds_reactions.pdf
    • http://tosefabebiribow.scienceontheweb.net/rudesefas.pdf
    • https://damepigafu.weebly.com/uploads/1/3/4/7/134725174/9069824.pdf
    • https://tetuxexe.weebly.com/uploads/1/3/1/8/131871535/6692370.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lasiliroba.epizy.com/pearson_nursing_diagnosis_handbook_11th_edition.pdf
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_f96de1dffd2a4b48b825b7527718a131.pdf?index=true
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_794885486789425ba70f54ed47806736.pdf?index=true
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_50872f1b14c64a54ad67763232a058ae.pdf?index=true
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_786c91407da243f9b13d97d225969528.pdf?index=true
    • http://fusozevukatamir.atwebpages.com/speak_now_2_student_book_free_download.pdf
    • http://merujepapi.epizy.com/28687524073.pdf
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_529189ece7a84ca2a3d88bb2c56f2924.pdf?index=true
    • http://lojabupabavize.onlinewebshop.net/silence_is_the_language_of_god_all_else_is_poor.pdf
    • http://vuripoda.epizy.com/35086371748.pdf
    • http://madepadejatutof.onlinewebshop.net/7591582389.pdf
    • https://78ee58ad-4251-4cb6-9d9e-6f806931ac90.filesusr.com/ugd/b6b4e8_a403a664712248958e0048346774ef43.pdf?index=true
    • http://zerowegujij.onlinewebshop.net/53498446159.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e2f.bin
873ae1f14273c1fbbbceff089d6b481a0332d567c6c16c303fa5b8e42147b03a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 4928 bytes
font_01_sfnt_off00012efe.bin
364d22551cda7909ddd2bea8c24aab987e78ffca7afb46ca454a84941bca2bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFE 11308 bytes
font_02_sfnt_off00015529.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15529 4324 bytes

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