Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a149f7a7f29501…

MALICIOUS

PDF

78.4 KB Created: 2021-03-06 04:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4ae138dbba3e05edeada4e85273fc817 SHA-1: ec38e877f0ae65a3c35cbe8d84dd3598ffafb3ad SHA-256: 49a149f7a7f29501573af26592ba0813e70fa9bd9e98655b2524940a52eb46cf
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/strik?utm_term=root+zte+warp+elite+n9518 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477651/normal_60048dbe9ef7b.pdfIn PDF document text
    • http://wudenufodoroziv.scienceontheweb.net/how_to_use_weight_watchers_point_plus_calculator.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/7280301.pdfIn PDF document text
    • https://xapidusexinixov.weebly.com/uploads/1/3/1/3/131382907/4814d54a0c518.pdfIn PDF document text
    • https://legotukalijev.weebly.com/uploads/1/3/1/3/131380351/1759c60a74.pdfIn PDF document text
    • http://apple-fruit.space/sujeraa04o4.pdfIn PDF document text
    • https://ximipozatapemo.weebly.com/uploads/1/3/5/2/135297631/62d083953d.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/the_lost_years_of_jesus_elizabeth_clare_prophet.pdfIn PDF document text
    • https://zazafiwizodizi.weebly.com/uploads/1/3/4/0/134041258/f153b3fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_600d95a4104e2.pdfIn PDF document text
    • http://strongcreditscore.info/why_la_la_land_won_oscargfry0.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/45502841908.pdfIn PDF document text
    • http://yachts-4-sale.com/automotive_bulb_numbers6dzsl.pdfIn PDF document text
    • http://triple-doska6.club/tuwopivekidajwifr.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/nanekuxivimeru.pdfIn PDF document text
    • https://nibuzexo.weebly.com/uploads/1/3/4/7/134720699/62d4f2f40c3.pdfIn PDF document text
    • http://xeeewq.xyz/wizz_air_careers_cabin_crewtjd8d.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/what_are_the_treatment_for_anxiety_disorder.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_c59c3ed7fe8c45cf846bbb55af21d870.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_bdc02e91b8e2415f8e69d224e1484b2d.pdf?index=trueIn PDF document text
    • http://zirutabu.myartsonline.com/toro_electric_snow_blower_troubleshooting.pdfIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_c932a1a5ea96476ab44576d373aa36b9.pdf?index=trueIn PDF document text
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_6810a5c03f5549aca2ad1ea1e3258a77.pdf?index=trueIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_f86e5f6a931f4023bb3e232ca8dec8dd.pdf?index=trueIn 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_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 5312 bytes
SHA-256: 7e2da0b4e26e6c5d141319057791904bdd4072338a3581cb7e5348530bcabc87
font_01_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 11424 bytes
SHA-256: a0279c14d608de1f3267f965fe98046d978a705cc3c1a90af62610644b403f46