Malicious PDF — malware analysis report

Static analysis result for SHA-256 193d00c12414aa2a…

MALICIOUS

PDF

69.8 KB Created: 2021-05-31 23:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe2a40de1692bc26a0fc0dd007032171 SHA-1: 1512496810d014f6aee4e392f65eb88eb1064185 SHA-256: 193d00c12414aa2a362dcd0cbcef506abdefaaf59afa72db58acdec24b07d3a3
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many hosted on disposable domains, and is flagged as a link farm. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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 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://irlanc.ru/pbw?utm_term=dark+flippy+x+reader+lemon+wattpad
    • https://cdn-cms.f-static.net/uploads/4496815/normal_603b98dd32d4d.pdf
    • https://zimatesuti.weebly.com/uploads/1/3/0/8/130873828/zofokaravovapamog.pdf
    • https://filududo.weebly.com/uploads/1/3/5/3/135390237/4687458.pdf
    • https://bategasef.weebly.com/uploads/1/3/2/7/132712490/xokomuxofuf_zuzaziw.pdf
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/1687958.pdf
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5fe054584bf28.pdf
    • https://nidexopike.weebly.com/uploads/1/3/1/4/131407316/23b300.pdf
    • https://palekanino.weebly.com/uploads/1/3/4/3/134372766/d60256a49087.pdf
    • https://cdn-cms.f-static.net/uploads/4465131/normal_60225f20154b1.pdf
    • https://tuxatijofewimem.weebly.com/uploads/1/3/4/6/134686538/nosokedudife_mivumesadusaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xalanupuzewo.pbworks.com/f/galexogugajagijajiludi.pdf
    • http://lakebimutep.pbworks.com/w/file/fetch/144418206/how_to_pass_your_permit_test_in_minnesota.pdf
    • http://mumubib.pbworks.com/w/file/fetch/144413301/82647769637.pdf
    • http://lugozamuxika.pbworks.com/f/what_type_of_stress_causes_rock_layers_to_fold.pdf
    • https://uploads.strikinglycdn.com/files/ce5a4276-28e7-4870-8d5c-8cfed7472188/77954523506.pdf
    • http://lekipirunezi.pbworks.com/f/the_delectable_negro_free.pdf
    • https://uploads.strikinglycdn.com/files/f9e902af-cc0b-40a3-a15e-5abe5646102d/oorlogswinter_wikipedia_english_subtitles.pdf
    • http://lekuzax.pbworks.com/w/file/fetch/144418785/ib_biology_course_book_2014_edition_oxford_ib_diploma_program.pdf
    • http://poxanoralanu.pbworks.com/f/gusizageto.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ae.bin
2154873efdaa564762d15eb98d45264b50aeb90fe20f1cea538a4ad67ce7d61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 5332 bytes
font_01_sfnt_off0000e3e6.bin
76d041f247168daa1c012912f1ed8f43a4bf876702a9cc923bb1e34ad575d4aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 11208 bytes

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