Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f151531ae2750fb…

MALICIOUS

PDF

83.5 KB Created: 2021-01-08 18:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f4b07b68b83232144b154cd428c9db82 SHA-1: efe35408658b56299929dc64248a0c9b010f0d4e SHA-256: 2f151531ae2750fbdbf019fc29caf4f4a073c283ad73e0aff4b7fd9d4ff9040d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO spamming technique. The primary URL, "https://trafffi.ru/aws?utm_term=adobe+illustrator+coreldraw+free", indicates a lure related to free design software, likely to direct users to malicious content or phishing sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=adobe+illustrator+coreldraw+free PDF link annotation
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/xuwetatenapupo.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/4c2cb17da89382.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://nepefesin.weebly.com/uploads/1/3/1/4/131410606/55474.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/veliwuji-juderekevasaxa-lamexita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f946794c6ff5.pdfIn PDF document text
    • https://devusabuzanuwuz.weebly.com/uploads/1/3/4/3/134352374/pikaxarepobabin_pasej_fuvoz_lekebon.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://uploads.strikinglycdn.com/files/36b6fd29-0eb3-487c-9838-fe26123cab51/ridewodak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bd6203-d094-44c4-aba8-d4aa42b112b8/38123116162.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/65040835693.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/adt_alarm_honeywell_quickconnect_lynx_plus_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782f7484-7f9c-4634-bfe9-1c261bf1de4b/skate_dice_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/jejudodevumoralopovaja.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/wavibetuzulitegabanobav.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010c6b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C6B 21824 bytes
SHA-256: 3264de806a7bda29cd20879206030092891b9cba75c62a94fda82ed7fba65656
font_00_sfnt_off0000d748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD748 5012 bytes
SHA-256: 9102a3684aa23db6f4545842d1e0aea2296c57af80cdbe058b05fceede4db1b3
font_01_sfnt_off0000e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 10496 bytes
SHA-256: 7a5115acc557b3cc8d9f6fa835c06579f71b1857286d6c032d556a3508bdaf3a
font_03_sfnt_off00013255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13255 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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