Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067683e5dc082e1…

MALICIOUS

PDF

82.3 KB Created: 2021-03-12 11:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fe665cd5e030e886cf15ae231186f20b SHA-1: 22d8c41962253ccdc14fc0fd5fa718f5718c2c34 SHA-256: 0067683e5dc082e15c632aeca8829f493bdb87b46c3f9e2f908f2211e6326118
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=law+of+trust+in+malaysia PDF link annotation
    • https://jinozeposejide.weebly.com/uploads/1/3/1/4/131453810/fajoxa.pdfIn PDF document text
    • https://nifosigi.weebly.com/uploads/1/3/4/4/134488788/2397243.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/pufixozatopulat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_6038ed958843b.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/7_day_vegan_diet_challenge.pdfIn PDF document text
    • https://cdn.sqhk.co/musarawaw/d5QgcD5/dropbox_sync_android.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/gjhjaih/zilim.pdfIn PDF document text
    • http://nusixogej.iblogger.org/pevekewovabozova.pdfIn PDF document text
    • https://gubaxuxozixiviw.weebly.com/uploads/1/3/1/3/131383744/5751709.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/ixRhfhb/zidururexad.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/bjhjgjg/sogebawumulurafopodebat.pdfIn PDF document text
    • https://jezexubuxerib.weebly.com/uploads/1/3/4/0/134040893/9015768fe97531.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/linojefibumanata.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/sentence_or_fragment_worksheet_4th_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_6041de5b5d590.pdfIn PDF document text
    • http://roserubusigiwij.mywebcommunity.org/jersey_city_public_schools_pay_schedule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_2bffbf01714b4fc8aefca047d90a82fb.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_11f382db8fe34c1280c62c2ee583b317.pdf?index=trueIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_0039136eb34d45589a97a1c31aa777c4.pdf?index=trueIn PDF document text
    • http://pibanifadedo.epizy.com/able_free_bullet_journal_printables.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_08903ed4a30c4b2da8191ca00a4c853a.pdf?index=trueIn PDF document text
    • http://godanalig.epizy.com/average_salary_of_engineering_manager_in_canada.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_51ecd67f5e274ea199cb506289bc218f.pdf?index=trueIn PDF document text
    • http://nononowixumutu.rf.gd/63868446508.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_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 4812 bytes
SHA-256: 7d6b8d1a836fa36d91cc1042d1d9ef537753e88ee61d55e340f67f1c26537219
font_01_sfnt_off00010908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 10824 bytes
SHA-256: 7a12523d83fd580cfa276feaf8c407015e1ce407842b4f740daf75b52d147719
font_02_sfnt_off00012d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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