Malicious PDF — malware analysis report

Static analysis result for SHA-256 d564048b81b685af…

MALICIOUS

PDF

80.8 KB Created: 2021-02-17 04:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9c217d6ca76452b4f123aa76d900fae4 SHA-1: b67d98abd4db36025e2e3a46ce602bfacc897d2f SHA-256: d564048b81b685af19677749bc46c5a03f6a8a1ee43398576cb5ac6a54e9caa9
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://yafferge.ru/wix?keyword=cost+of+train+from+rochester+ny+to+nyc', which is likely used to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=cost+of+train+from+rochester+ny+to+nyc In PDF document text
    • https://cdn.sqhk.co/noxisoture/9oXHfhd/sutumivepopilupag.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/vujiluwakar.pdfIn PDF document text
    • https://cdn.sqhk.co/kepigofunet/7hcpYt3/gonovaji.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/hiidHif/logef.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/MPEjf3M/xowipiraj.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/Lhihewf/mental_hospital_pick_up_lines.pdfIn PDF document text
    • http://pupofikavize.iblogger.org/penojojoparurerijo.pdfIn PDF document text
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/lubafewu.pdfIn PDF document text
    • http://trells.space/badiliwajipevor89oxh.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/wDhjmnV/35380590680.pdfIn PDF document text
    • http://nubolutlion.xyz/fybcom_banking_and_finance_notesqtz6f.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/byZVihb/red_eyes_swordsman_of_landstar.pdfIn PDF document text
    • http://abwaab.su/749061245543fivy.pdfIn PDF document text
    • http://avtovishki-msk.ru/62696042858m2ldx.pdfIn PDF document text
    • https://gefogujuper.weebly.com/uploads/1/3/4/0/134012332/gijegul.pdfIn PDF document text
    • http://jurelireroxux.22web.org/94341237589.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopinakitiwodad.rf.gd/lixopiwokozapowotejupatim.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 5096 bytes
SHA-256: 94fe64fe2ddf456216a74b205d70c9a61b2a755e6ff96d1513efb2326cb6e8ff
font_01_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 10476 bytes
SHA-256: 3abb1e99350bb5797b8e45e307a234f9446e587d2b41cca4fc5319dd0ca3c165

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