Malicious PDF — malware analysis report

Static analysis result for SHA-256 000f48e847302c3e…

MALICIOUS

PDF

77.7 KB Created: 2021-04-04 15:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6e8ed802a0350ad563a23fed4a1a159d SHA-1: d59225ceac7938caae919a6d80da03fbeee50984 SHA-256: 000f48e847302c3ea8cfbe803107fad6ac8b0b9daea890c12f56862036c5950e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO spam operation. ClamAV and ML classifiers also flagged the file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest an attempt to redirect users to malicious or spam content, potentially as a precursor to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://botokaw.ru/wix?keyword=mother+tongue+amy+tan+rhetorical+devices PDF link annotation
    • https://sudunubi.weebly.com/uploads/1/3/4/4/134496389/2970076.pdfIn PDF document text
    • https://binaxigaxixin.weebly.com/uploads/1/3/4/8/134864800/3785367.pdfIn PDF document text
    • http://damomemisogadex.iblogger.org/airfix_model_world_june_2020.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/kezolo_jasezabizatikir_luvuluva_lilutabebizeb.pdfIn PDF document text
    • https://palisuxil.weebly.com/uploads/1/3/1/0/131071308/mimizuz_zajixifemafuvel.pdfIn PDF document text
    • https://mowasevibipogo.weebly.com/uploads/1/3/1/3/131379904/zozexirewamase.pdfIn PDF document text
    • https://jutonoxefakevuw.weebly.com/uploads/1/3/1/4/131454335/koraz.pdfIn PDF document text
    • https://wovikuzejujitij.weebly.com/uploads/1/3/4/5/134506660/lotoxug.pdfIn PDF document text
    • http://xeboxemovev.66ghz.com/dewalt_d55146_type_6_parts.pdfIn PDF document text
    • https://tupobufilu.weebly.com/uploads/1/3/5/3/135310482/6705618.pdfIn PDF document text
    • https://zoviwifave.weebly.com/uploads/1/3/6/0/136053666/xitak.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/1939471367.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bejopobu.epizy.com/58077344730.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/enterprise_software_license_agreement_template.pdfIn PDF document text
    • http://sadotewaxajus.epizy.com/how_to_fill_my_humidifier.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/27917283212.pdfIn PDF document text
    • http://kupipeda.epizy.com/which_of_the_following_components_of_an_operating_system_is_not_part_of_the_kernel.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/99188860985.pdfIn PDF document text
    • http://natovagokije.epizy.com/can_you_still_romance_cora_after_peebee.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_off0000f137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF137 5520 bytes
SHA-256: a3c7843115b53c3bf3ef4c8e34385357144875df408969b4115e0e074a0797e7
font_01_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 10452 bytes
SHA-256: e7129cbc3a2cf2dfe053ec3fbe6914ac3dbdc078e5767012bac98854b289eb1f

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