Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1584149a231da76…

MALICIOUS

PDF

72.4 KB Created: 2021-01-13 17:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4adcda67dca76ecc9d10f6c7bf4889b SHA-1: e38827a1aa07a140f20e17fe6779b6ecdfad4727 SHA-256: b1584149a231da761f31f83eb598fe1661a5574645339753c7cf63d483286b63
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'traffking.ru', suggesting it's used for phishing or to host a malicious payload. The document body, though partially obfuscated, contains text related to bus station information, likely serving as a lure to trick users into visiting the malicious site.

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 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://traffking.ru/aws?utm_term=autobuska+stanica+novi+sad+informacije+telefon
    • https://site-1202168.mozfiles.com/files/1202168/xapemogaxaxanamaxol.pdf
    • https://cdn.sqhk.co/pemejurove/ithgXWF/gudisadotowuzadinozisur.pdf
    • https://cdn.sqhk.co/xupasutejos/KgeBihI/duo_mobile_app_nyu.pdf
    • https://site-1176160.mozfiles.com/files/1176160/download_cube_physics_simulation.pdf
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/632e03cbe.pdf
    • https://site-1172123.mozfiles.com/files/1172123/zoponekizi.pdf
    • https://site-1180826.mozfiles.com/files/1180826/98882212570.pdf
    • https://site-1177516.mozfiles.com/files/1177516/bejeweled_stars_free_match_3_mod_apk.pdf
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/862f27556c.pdf
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/jufekiledevat-vabipabaxuzala-kosaxojarit.pdf
    • https://site-1189081.mozfiles.com/files/1189081/66454371170.pdf
    • https://site-1215606.mozfiles.com/files/1215606/64196268283.pdf
    • https://site-1172540.mozfiles.com/files/1172540/bangladesh_govt_holiday_calendar_2018.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zoxewudunigus/havoc_demon_hunter_mythic_plus_guide.pdf
    • https://s3.amazonaws.com/jemazejodep/pokapulivezovawuxirivev.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf81.bin
d24b15a818036f807d29418fe27f5ef171c498dc33b534bcdc312dae79e9eeb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF81 5496 bytes
font_01_sfnt_off0000d22f.bin
1cb183358fbeb09a22772b07601210fb4e418ffe6a05bb2744bf419573d58d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD22F 14436 bytes
font_02_sfnt_off0000fd5f.bin
2cca29575edef7a9880cf400a7847cc5df22ba1ee7edc19c7b9bafe603f6c979		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 16060 bytes

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