Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c79d04f481100e…

MALICIOUS

PDF

76.7 KB Created: 2021-05-24 10:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0049a545fe02830902d044ec3285b267 SHA-1: ecdc602a4be43315cbfb300f8889303b38b570dc SHA-256: d2c79d04f481100eb35f0fd5e541bf001569fff1841e097902f607e3895641ef
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://pelibifir.ru/strik?utm_term=ella+mai+songs+mp3+free+download', is embedded within the document, likely serving as a lure for users searching for free music downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=ella+mai+songs+mp3+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5ff7ba0b71201.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/nomisovemorak-majepu.pdfIn PDF document text
    • https://numesenara.weebly.com/uploads/1/3/1/0/131069843/2d801decefcf6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_602450c54de2f.pdfIn PDF document text
    • https://xolixofebus.weebly.com/uploads/1/3/4/5/134502144/453669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449009/normal_5ff03d1122127.pdfIn PDF document text
    • https://ribigitapupag.weebly.com/uploads/1/3/4/8/134887221/d9c1041768eec.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/3001c9618.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/bejebefobi.pdfIn PDF document text
    • https://zizudenavoxe.weebly.com/uploads/1/3/4/0/134017195/wowilim_zulufawef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fff43b8d72fd.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/lubinododedazijila.pdfIn PDF document text
    • https://detidigem.weebly.com/uploads/1/3/4/4/134491675/78fbcf237549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajujiju/losunefisavevozobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f623a3f6-5ceb-4aa9-8ef1-d55c9ce37b4d/zematunenadadibezamolez.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/buy_adobe_acrobat_x_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/wibuwolilekuxuruzepolat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ef0315-5e46-44ff-9599-292eadd69f0a/80260515850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7079e1-dd13-45d6-bfec-7f3d2d834568/cuanto_equivale_100_gr_de_mantequilla_en_tazas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacdd508-582f-43a9-93eb-6e4a0d6d8269/dimabamukitesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4505041f-1d29-4696-b61b-64132b27d68e/how_to_make_a_turkey_breast_for_thanksgiving.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/black_off_the_shoulder_semi_formal_dress.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_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 5572 bytes
SHA-256: 70211a4c942333bd4f3b389aa650dffda7a4ca4e38d47da4b476740c4bc94d6a
font_01_sfnt_off0001004c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 10744 bytes
SHA-256: 52f526079da932cb10d84e64e831fc472ca6f2fe63273ef5b19ea882084f3f03