Malicious PDF — malware analysis report

Static analysis result for SHA-256 3806f96a14dab5c2…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 01:07:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d604ce208717f154eaa25b06db1fbf3 SHA-1: e1e5d7830086848a892bc9bd6130dca8ea3af39c SHA-256: 3806f96a14dab5c26a61279791d9aef397da72cf1a1008092e702ad64d8d9af4
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to a link farm on disposable hosting, suggesting a tactic to distribute further malicious content or engage in SEO poisoning. The PDF's structure and embedded URIs indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://leonvi.ru/award?keyword=lyrebird+cecelia+ahern+pdf PDF link annotation
    • https://cdn.sqhk.co/dasisogi/iihcCjf/tear_clothes_dream_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/iaCWEqe/advance_auto_parts_jobs_ocala_fl.pdfIn PDF document text
    • https://reseviris.weebly.com/uploads/1/3/5/4/135400779/xogibib.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/luvalamorefemevuze.pdfIn PDF document text
    • https://xijeruwenuvu.weebly.com/uploads/1/3/4/0/134018409/6374508.pdfIn PDF document text
    • https://cdn.sqhk.co/naxisedomak/yfjg2hb/58694214854.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/3367da.pdfIn PDF document text
    • http://kuwegatopu.iblogger.org/patofisiologi_alkalosis_metabolik.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/ifiiUK3/sniper_3d_gun_shooter_mod_apk_download_2018.pdfIn PDF document text
    • https://jowujutaxafekul.weebly.com/uploads/1/3/5/3/135348014/zesuserujovizefeki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zinezalidoratov.rf.gd/inverse_trig_functions_word_problems_worksheet.pdfIn PDF document text
    • http://kivosokefenugez.epizy.com/techos_verdes_construccion.pdfIn PDF document text
    • http://difikuxim.epizy.com/wogasejaje.pdfIn PDF document text
    • http://sasomibaben.rf.gd/nuneponevekufeziradu.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/16492185981.pdfIn PDF document text
    • http://gexefafuli.rf.gd/vakaku.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/purpose_driven_life_day_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef744dc5-3987-467b-8830-b4eb7fc1c34c/92444118209.pdfIn PDF document text
    • http://desiwafinu.epizy.com/al_quran_translation_in_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/vernier_caliper_reading_exercises_with_answers.pdfIn PDF document text
    • http://pipubim.rf.gd/43638910436.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 5248 bytes
SHA-256: ddd504a09a51c8d1b2615503bbdeb099c4752c506aaa0ca1f791aef7bdece0b0
font_01_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 2884 bytes
SHA-256: 1213b41b7171378c19388f350c6f9545fecce6a73c2540867fcbb71d0770df20
font_02_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 10780 bytes
SHA-256: 8839d6941c733c96307df728b68de6e077dd47186d4bba8f8c5f4b0aaf9bcf6a

Open this report in the interactive analyzer, or submit your own file for analysis.