Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01931c8a203354c…

MALICIOUS

PDF

79.7 KB Created: 2021-04-28 15:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9ebd9527039f234eff302df33c45309b SHA-1: 9a5170b5494bbc842c28467898443e4e9409b49d SHA-256: e01931c8a203354c32f08f6ec99bf4e3d44d27ffe3d4aad296e6cb4e3a6cd280
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely leveraging social engineering to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • 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://nipisod.ru/strik?utm_term=among+the+impostors+read+aloud PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493579/normal_5fdc6d9cc1ad4.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/ijntagd/suneduvuwibowelewotilol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_6035dbc4c9081.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/jupobupolipanet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425507/normal_6007cdeea7ee4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384304/normal_5fe11060a293f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_6040ba5fa2f30.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/hbhegjf/brick_builder_lego_city.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384851/normal_5fc75a6153db0.pdfIn PDF document text
    • http://freedate18.xyz/cambridge_fce_past_papers3ow8i.pdfIn PDF document text
    • http://dkshlyap.ru/68844749569foc22.pdfIn PDF document text
    • http://afracheat4.xyz/vexesufigowekizunemexz5xcm.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/97331429783.pdfIn PDF document text
    • https://cdn.sqhk.co/pitadewedobu/phfkB4r/65844887393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fe4c5c532b13.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/C5Xgfib/pojezabulivemozimifovaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_603df7eac0fc9.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/jcTghps/pocketmine_plugins_list.pdfIn PDF document text
    • http://gawetuzunugigos.iblogger.org/oligopoly_market_model.pdfIn PDF document text
    • http://swiss-gear.shop/traumnovelle_englishn0ryt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5fecb5eb57e27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giritinip.epizy.com/tunogujefodulenadesesuf.pdfIn PDF document text
    • http://rorewoj.rf.gd/tejidomifa.pdfIn PDF document text
    • http://loxupobupibim.atwebpages.com/30016512537.pdfIn PDF document text
    • http://nimunofat.epizy.com/blouse_cutting_in_tamil_free.pdfIn PDF document text
    • http://gozefanilufi.epizy.com/99787827976.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/65092193096.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_off0000fb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB09 5360 bytes
SHA-256: 2a9c98780201551981b1957d0967d35d54eee5a2aac493f8b81d6d6c10ab21b3
font_01_sfnt_off00010d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1C 10652 bytes
SHA-256: 491297712bb4627e6e6d89d623e0b9a95b0b42549e2dc7ccf2e7b73534d97c3d

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