Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68dee2f0f7604d2…

MALICIOUS

PDF

80.8 KB Created: 2021-03-20 20:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b6a2fbd611b9bd9922670dd71eecff31 SHA-1: 43bfb4243584dee3e6461ef5d16ea73286e3921d SHA-256: b68dee2f0f7604d2a7affc88026369785aa00eabd3f1769ef12cd23e2a3a6d5c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body is heavily obfuscated and appears to be a lure, possibly related to SEO manipulation or directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://golowaki.ru/aws?utm_term=toni+morrison+sula PDF link annotation
    • http://funafiwutera.iblogger.org/difference_between_assess_and_evaluate.pdfIn PDF document text
    • http://zerudomafiko.iblogger.org/jafovubalusu.pdfIn PDF document text
    • http://fesifula.22web.org/20768363021.pdfIn PDF document text
    • http://zupiworifokovaw.22web.org/vobepekilituvuliwetuxeme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/092d827c-1fba-47d8-9921-f5fa822631ee/how_bad_is_dunkin_donuts_coffee_for_you.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_b1c9d897ac974d8795dbdc2e6d935bb4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e72c06f-3796-439b-9b07-24f36ec4a322/talend_big_data_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58bef354-b37c-40f3-8982-0740159fd893/cuanto_es_150_gr_en_una_tazas.pdfIn PDF document text
    • http://nolivajujereram.rf.gd/162496067.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_ad33fc9ed16c4023b8cd030cfff97ae5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/500f4f88-8fde-48a6-8a50-c0c4e6705b12/18012171279.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_5f68c02e9a3b4698bd1f158353f4d167.pdf?index=trueIn PDF document text
    • http://gafamiziwadi.rf.gd/ziwefexavifiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2a2706c-28d5-40df-8f9d-f711c37a0b7f/fuxef.pdfIn PDF document text
    • http://nadezuj.epizy.com/marvel_comics_1001_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb97abb4-5e31-4618-9079-fda8ba79aca5/mfj-949e_deluxe_versa_tuner_ii_manual.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_off000100f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 4780 bytes
SHA-256: 776d9eed8a2c0c26e0b983b9f1cc2e8ffedc46ae87caaacb2d42198875a216f1
font_01_sfnt_off0001110f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110F 10952 bytes
SHA-256: 35f61162ebf26b106b3d33db06804843977627e4663a39d66845a4a30dc7bb5d

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