Malicious PDF — malware analysis report

Static analysis result for SHA-256 8342dee662142afa…

MALICIOUS

PDF

90.7 KB Created: 2021-03-16 05:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a36213248d14c5bb2b366c59f0846ac1 SHA-1: a3988a9e0435a1cfb2c81bfb0772368f42a7d642 SHA-256: 8342dee662142afa33e7a081e2b6bceda9383d2a00e6ff6c64c0c0013cd0f200
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/wix?keyword=honkai+impact+3rd+phoenix+guide PDF link annotation
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/kojufi.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/xolawudoxudujuvasora.pdfIn PDF document text
    • http://lemoxovuv.22web.org/casper_1995_movie.pdfIn PDF document text
    • http://fudupavebinexad.22web.org/69604970383.pdfIn PDF document text
    • https://vatenesarawe.weebly.com/uploads/1/3/0/7/130775606/6bfa38.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/dozig.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/bb1bea.pdfIn PDF document text
    • http://trudogoliya.online/rifusimavovebinemukhw8nb.pdfIn PDF document text
    • http://opsnatur.fun/spotify_android_download_cellularwlqwj.pdfIn PDF document text
    • http://babysampler.com/the_merciless_danielle_vega_read_onl4i10n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/097e3995-bdd9-4b84-b4bc-956b02382758/xegen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162e0750-4b4d-4051-8899-ebc672c48cbe/62214418581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae1209f-93f4-4c02-9afe-4174b94c6f99/jusuzerob.pdfIn PDF document text
    • http://jabukejezari.epizy.com/83862297997.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_3b175ae2fb4b45f0b27ef32790501c54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd96aff-ada2-4907-8823-a293a386b919/what_goes_good_with_red_wine_sauce.pdfIn PDF document text
    • http://pajoxewujovero.rf.gd/nkjv_bible_free_for_ipad.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_070be85a7afe4af39048cefdab74f0b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31b38c5-1261-45e2-aa91-554323e7f086/vekolamosodokefelosirutav.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 3644 bytes
SHA-256: 5ecc5fd149e097b9b412b7a172eacc4db5b654d54a86dec52bf5ab7241252529
font_01_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 5416 bytes
SHA-256: 7637f6807252c7442669b7020d4d78001f9e66a5cabb91a961cbcaed3f767f31
font_02_sfnt_off00011751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11751 8124 bytes
SHA-256: e5561bdc2c080ef08c424d16cffd8ed1b3ec88be6dfdccee6589b84d1e648e98
font_03_sfnt_off00012d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8B 9792 bytes
SHA-256: 6657a9ff4b8f8ea4ffecc44076e98af7a851456ad988a340330d22b433baa44e
font_04_sfnt_off00014eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f