Malicious PDF — malware analysis report

Static analysis result for SHA-256 baad2a35d81fa79f…

MALICIOUS

PDF

71.2 KB Created: 2021-03-16 01:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84eb03fa9e4e18366be63af2cd5fd384 SHA-1: 1448a963c5867144be25e0971bc0021637719969 SHA-256: baad2a35d81fa79f12c0dc8364ad58d2bb191be20418ae20438f9fa0c5619677
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm for SEO manipulation or to host malicious content. The primary URL, 'https://lozipotod.ru/strik?utm_term=letra+y+acordes+esto+que+soy+eso+te+doy', is flagged as suspicious and likely leads to a phishing or malware download page. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=letra+y+acordes+esto+que+soy+eso+te+doy
    • https://cdn-cms.f-static.net/uploads/4401517/normal_5fe87a397d2bf.pdf
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5ffb3002b2862.pdf
    • https://static.s123-cdn-static.com/uploads/4412895/normal_5feb483318955.pdf
    • https://pirogitemaxo.weebly.com/uploads/1/3/1/0/131070842/gumebuw-vizadid.pdf
    • https://pekeweluxema.weebly.com/uploads/1/3/5/3/135304067/mawujiga_kefukup_nezija.pdf
    • https://static.s123-cdn-static.com/uploads/4390092/normal_5fde79fa2d12f.pdf
    • https://cdn-cms.f-static.net/uploads/4485799/normal_600b48d0bb48e.pdf
    • https://static.s123-cdn-static.com/uploads/4393020/normal_5feb31e90f47f.pdf
    • https://static.s123-cdn-static.com/uploads/4476273/normal_5fddd43f9cc27.pdf
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/9a190dbf7bb.pdf
    • https://cdn-cms.f-static.net/uploads/4465270/normal_603b4ddf71965.pdf
    • https://static.s123-cdn-static.com/uploads/4424043/normal_6000890d8a536.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kotenu/sap_bpc_tutorial.pdf
    • https://s3.amazonaws.com/fibesezati/49185298907.pdf
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_05cdabcea5c44075a3611a60af4610b0.pdf?index=true
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_0d3ae86996ba437682a1691d81814e1d.pdf?index=true
    • https://s3.amazonaws.com/nosepevozux/dozefejotex.pdf
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_e57353d8231744a08afa784284cb5ab2.pdf?index=true
    • https://s3.amazonaws.com/xokebore/gadineledif.pdf
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_e1846d9629b44699a8a9c688beb51f13.pdf?index=true
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_95625458b0b941b3ad31feecd2e81d53.pdf?index=true
    • https://s3.amazonaws.com/wisuw/wamesafasur.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d620.bin
7d71d7416ce50f88cacfd48a358333f4d95a25c943bc92324f05223f79222339		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 5068 bytes
font_01_sfnt_off0000e772.bin
3f99989033b8655170995d601d4ca6a18d192d26a17c55dfcd9ac0ec845cafff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 11664 bytes

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