Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d086c5f16e2ccc2…

MALICIOUS

PDF

75.1 KB Created: 2021-02-21 03:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9c6b0be1404431ca976c30d27c49c74f SHA-1: 13a433949519f4b8e0aac5a64fac03468f788273 SHA-256: 8d086c5f16e2ccc274c2365d140a9eed3a64a0526cd4ca044603d56b3bc3f674
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being https://druttle.ru/wix?keyword=motogp+apkpure+download. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to drive traffic to malicious sites.

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://druttle.ru/wix?keyword=motogp+apkpure+download PDF link annotation
    • https://cdn.sqhk.co/retagigimusa/4WjaUje/19077237727.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/gPsjdhf/fivopupixuvusofur.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/7537556.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/3192417.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/icgh6xd/skullduggery_island_trading_guide.pdfIn PDF document text
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/ed01f1ea3ef0ef.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/6j75xcs/pabeluvonetewufoverakova.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/Aib9deC/51621763435.pdfIn PDF document text
    • https://savibivo.weebly.com/uploads/1/3/1/3/131381036/jekoser.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/dJjepeU/guwuxor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/handbook_of_analytical_method_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/dufinakilurugo.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/zizobuxafigaxalizonowud.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/20198207502.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/xurifukin.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/bluetooth_suite_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/byte_of_python_book.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/xufed.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/linok.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000db2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDB2A 2212 bytes
SHA-256: af3aa4a79b591e623a5800b7eafaf6f1efb8f9ea52a796ed52f8fec8315c702b
font_00_sfnt_off0000c999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC999 5112 bytes
SHA-256: 1f42642f31b2b3b55aea6338d243edfd16fa0b30b8c0037c3ee9a3637b005c95
font_02_sfnt_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10180 bytes
SHA-256: be6eaf7040b180cb3d72c20bc915b2fa6949fb8b9547c5f231446563b436041f
font_03_sfnt_off00010871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10871 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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