Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6e5f612cbdb2df…

MALICIOUS

PDF

81.9 KB Created: 2021-03-20 23:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 73d3287deb6c0ba96243e2530f492488 SHA-1: d47b985fb5c809b8523d285caa817d61124daeb7 SHA-256: 1e6e5f612cbdb2dfe202df921ba20df7ca8e65e6fe3d14ff44c17d5eea007d0c
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs pointing to disposable domains, suggesting it functions as a link farm to distribute malicious content or phish for information. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=howrah+bridge+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450419/normal_602d70493df25.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/90209280355.pdfIn PDF document text
    • http://kuwawaf.mypressonline.com/josonoxobalumaxugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369932/normal_5ff719f8d2615.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/how_many_covid_vaccines_in_trials.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409827/normal_60271fd8c05c9.pdfIn PDF document text
    • http://birjand.design/58257859663u152s.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/58041035222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_601b53618c23c.pdfIn PDF document text
    • http://drovazvenigorod.ru/what_is_the_best_weight_gain_diet_plandiz02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_5fdad46070f4c.pdfIn PDF document text
    • http://aov.one/ultrasound_guided_aspiration_seroma_cpt_codexwhfz.pdfIn PDF document text
    • http://xuzetekuka.22web.org/xesomixusamilil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovefopu.myartsonline.com/67484866947.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/36417960196.pdfIn PDF document text
    • http://pigutun.myartsonline.com/analog_signal_conditioning.pdfIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/rekeronidojofitomit.pdfIn PDF document text
    • http://xapakiz.rf.gd/amie_certificate_sample.pdfIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/nufepikino.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/45353197095.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/supersonic_indoor_tv_antenna.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 5280 bytes
SHA-256: 2f5fcec37c2a5ad95dba0a0b26e75e24b6f285484ae320d1a4f54e2be9d4aed9
font_01_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 10868 bytes
SHA-256: 0e8dca307fb869789ecdd918afc012d8e0708cb5912c77e028b54b2398614f90
font_02_sfnt_off0001251b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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