Malicious PDF — malware analysis report

Static analysis result for SHA-256 c515c748bdb2fda1…

MALICIOUS

PDF

72.5 KB Created: 2021-03-09 19:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2f8e0b705afef636f3afce5bad86bf74 SHA-1: 20234cc1ff5b6c50f57c6563748be282a6c21bc1 SHA-256: c515c748bdb2fda1920aa7a317f1a03f5e0f1fe718d0afc93b11e59ac65a4ca8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=how+do+i+change+the+code+on+my+liberty+safe PDF link annotation
    • http://tusapet.iblogger.org/whatsapp_latest_for_nokia_c3.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/tebizipevobizivax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_5fc745995382d.pdfIn PDF document text
    • https://gajegewajutop.weebly.com/uploads/1/3/0/7/130739456/limila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472206/normal_60262a0a73e36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_6007553168e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5fe97e3d8e76e.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/99358647689.pdfIn PDF document text
    • https://saxurugilura.weebly.com/uploads/1/3/2/8/132814125/9357705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_603015a5cdf57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401694/normal_5ffdd634bb136.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/how_to_reset_plantronics_bt300m.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/taoism_holy_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5fdb0190103fb.pdfIn PDF document text
    • https://pimusaxasoj.weebly.com/uploads/1/3/1/8/131856122/7152bd.pdfIn PDF document text
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/kafegovaxisakekumif.pdfIn PDF document text
    • https://ravekenelar.weebly.com/uploads/1/3/4/0/134041687/510563.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/jojetabu.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/istikhara_ki_dua_in_urdu_translation.pdfIn PDF document text
    • https://jepuderakemuso.weebly.com/uploads/1/3/4/6/134666912/sugaduvizosezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusibav.epizy.com/cnco_reggaeton_songs.pdfIn PDF document text
    • http://rodesodekisivu.rf.gd/citadel_income_fund_fact_sheet.pdfIn PDF document text
    • http://moliposapivar.epizy.com/malasalulepaxafi.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_off0000ddd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD3 5728 bytes
SHA-256: 9830bba3f20e922da9cc883784e89c21286978b9b520a0595852f4b846e49430
font_01_sfnt_off0000f13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 10360 bytes
SHA-256: d8fdd5761ec8d3e94d18789135fd099f362ba5f81a0da89cda320b946b16ed15

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