Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf75640817352ecd…

MALICIOUS

PDF

112.3 KB Created: 2021-01-04 02:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 47ca28a1e186cfb3c0e483d2a0ab2549 SHA-1: 87b9c0930a977435538a3679d60d63813e5b7df8 SHA-256: cf75640817352ecd35579b84d24397592537988e3ec9bd811c7d69bf1c5ed29a
156 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 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=battle+cats+upgrade+guide PDF link annotation
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/bakaputozefimow.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/a210440084.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/rovusafupe.pdfIn PDF document text
    • https://dujekiwirole.weebly.com/uploads/1/3/4/2/134266498/d9da0a090a8.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/latufoxurem.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/qtriiA1/fizenenakuxizinim.pdfIn PDF document text
    • https://jowomuzixife.weebly.com/uploads/1/3/4/6/134634296/nanakarufolo_gexalixada_lopel_lidid.pdfIn PDF document text
    • https://vixikuladiwepev.weebly.com/uploads/1/3/0/7/130738731/batagik.pdfIn PDF document text
    • https://balolemarivapi.weebly.com/uploads/1/3/5/3/135309218/6123380.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/ifiagcw/datuwidadu.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavalukato/85964489402.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/70421258437.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/rofikasinam.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/ranudu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/android_wear_update_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/2018_breeders_cup_classic_past_performances.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001614f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1614F 16156 bytes
SHA-256: 7831168f8081d30a91032cfcdd1bbc52e69796f4af5804c001290de6bc6bb784
font_00_sfnt_off00014f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F4F 5292 bytes
SHA-256: 2f238abea2d43269d986f2f0149db404b0c08d0b8e80731ea7acaf30750569e1
font_02_sfnt_off00018e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E24 10880 bytes
SHA-256: e152348e5b60517cde54264c98bc1198ff2289b7dc2c8de81475620b635db342

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