Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a84cec93dcb7b01…

MALICIOUS

PDF

80.8 KB Created: 2021-04-07 16:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06b2b4518ec9c8846799a5a9d618394d SHA-1: 785f958aa04f43eb4dea34c29d44ced7dbfb2c9f SHA-256: 2a84cec93dcb7b012ba237092e01952634007d08da4bcd469183c03c2dfdcbe6
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF being flagged as a phishing or trojan variant. The presence of numerous unknown URLs reinforces the suspicious nature of the document.

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
  • 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 http://zavodtriumf.com/what_causes_a_transmission_to_not_shift_gearssrbwd.pdf In PDF document text
    • https://vewenaloviriwu.weebly.com/uploads/1/3/2/8/132816087/1347676.pdfIn PDF document text
    • http://vwwv-avito.online/xupokejupabanozamujunesejgyga4.pdfIn PDF document text
    • https://zezenezanovux.weebly.com/uploads/1/3/4/8/134888099/bagipoduboxukop.pdfIn PDF document text
    • http://fasad-dom.site/ufc_tonight_channelw5sxg.pdfIn PDF document text
    • http://marketitaly.info/35980889256etinb.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/6216260.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/2dMwljb/.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/aiijakd/zuvuwinumu.pdfIn PDF document text
    • https://lerexujirizafet.weebly.com/uploads/1/3/4/3/134344290/522ada101dbe0f.pdfIn PDF document text
    • https://gixovazaviv.weebly.com/uploads/1/3/5/9/135982549/980cd344d1648.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/9bcbc303c7293.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/ec1e6b8901.pdfIn PDF document text
    • https://cdn.sqhk.co/roxirali/cG3lEls/rosulefunonemowoveteg.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/2hiHWhi/pinball_halloween_full_set.pdfIn PDF document text
    • https://dobeluxujopi.weebly.com/uploads/1/3/0/7/130775615/9948696.pdfIn PDF document text
    • http://brosbass.com/how_to_register_for_an_sat_subject_testy648g.pdfIn PDF document text
    • http://dashcamtopbest.com/8319315404851eve.pdfIn PDF document text
    • http://kemytbok.xyz/122230664549d17n.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/o_fyKxYoRT8/wb?keyword=how%20to%20clean%20an%20m9PDF link annotation
    • https://uploads.strikinglycdn.com/files/397b2089-c7be-4eed-9f81-2e459683191e/ccna_security_210-260_vce_dumps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc10d82-047d-493b-b209-9a7ee5deca4f/skywalker_trampolines_15-foot_trampoline_with_enclosure_blue_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9df27fd-6631-4871-addb-3b43a6265a38/70913729580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fddeab8-8b96-42f2-8b30-5dc0b29d6ccd/destilacion_fraccionada_petroleo_productos_se_obtienen.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_off0000ec28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 4620 bytes
SHA-256: 5048c067a55b7016fd6aa74dee399ccc5a9a93f7702390ce80279a700d2ed2f8
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 12868 bytes
SHA-256: 4279c77543ae440531b5b21776942cb8d4bee7003ee9b2cddadb618fa70991db
font_02_sfnt_off000125d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c