Malicious PDF — malware analysis report

Static analysis result for SHA-256 69faf21d907d1a06…

MALICIOUS

PDF

78.9 KB Created: 2021-03-25 21:38:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fec7e5b16c64e56cf0022b548a4860aa SHA-1: 2dc217c37eca546dd23b72062883c2395ddd38c6 SHA-256: 69faf21d907d1a0629943a3797878932afc3792dc72f123cc98df3b74bed5010
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with critical heuristics indicating it functions as a malicious redirector and a link farm. The primary URL, 'https://crophysi.ru/aws?utm_term=quote+of+forgiveness', is flagged as malicious. The document body, though heavily obfuscated, contains text that appears to be a lure, suggesting an attempt to direct 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
  • 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://crophysi.ru/aws?utm_term=quote+of+forgiveness In PDF document text
    • http://segwaywheelchair.ru/bijaxomezudewosep2we4v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_6037743529774.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/9256641.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/verifopajola_gasafafaropijal_sosekamemedeb_jetofi.pdfIn PDF document text
    • http://tuvimokasodo.22web.org/godonetekale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446147/normal_5febea75a7241.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/2304a063a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_602ec134d7511.pdfIn PDF document text
    • http://byseles.xyz/crossfit_programming_guidere3e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_6036d594e50b8.pdfIn PDF document text
    • http://pozebesibi.22web.org/83721886732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424683/normal_5ffddb475bc09.pdfIn PDF document text
    • https://witirasa.weebly.com/uploads/1/3/4/5/134525236/digubap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fewakemuwu.epizy.com/fubiwavaranilalibevog.pdfIn PDF document text
    • http://rikukevez.rf.gd/juruwividageravape.pdfIn PDF document text
    • https://aeedc83c-a41d-4179-9d48-e770e4c4cd47.filesusr.com/ugd/e010a7_da4233ebe4dc4ae1bd033bfc42175ae8.pdf?index=trueIn PDF document text
    • http://ramawotinejog.epizy.com/94056625498.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_e4606f490aac467bb7f2b122dbdc2544.pdf?index=trueIn PDF document text
    • http://buwozefavimim.epizy.com/dixons_carphone_annual_report_2017_18.pdfIn PDF document text
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_15eef690885548ef950833242d7dd9cb.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_eec7ff3fdd8d4f45b6462a7e1a299055.pdf?index=trueIn PDF document text
    • http://nadusapawamuj.epizy.com/nosobodekukeporexexufes.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_30afbfe21d0d46a6a71b0c26ba6aedd7.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_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 4812 bytes
SHA-256: 098b156940aaf6f3b538d6d8e16e22b1d5d0b1460135e8a6d108e4cfc5da8e97
font_01_sfnt_off00010915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10915 10956 bytes
SHA-256: 67578df75950640c433291593d43500a84245d6926d188ea47e5b7429415f6c1

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