Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e1d36e5d10c4e4…

MALICIOUS

PDF

74.9 KB Created: 2021-01-15 07:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8218bfaeecaefd7f15cfe00ca5f236bc SHA-1: 73ea60a6b07032230f1e891665b44e09e2575737 SHA-256: b9e1d36e5d10c4e419e3d6e8dcbf67711cedaf4ca4adca4b20c5a521695b227f
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical finding for a PDF redirector link to `https://traffmen.ru/aws?utm_term=osmosis+egg+lab+answers`. The ML classifier also strongly flagged this PDF. While no scripts were explicitly extracted, the presence of a malicious redirector URL indicates an attempt to lure the user to a harmful site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=osmosis+egg+lab+answers In PDF document text
    • https://site-1174586.mozfiles.com/files/1174586/doge_2048_hacked_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/Ggd7lhb/funniest_hilarious_memes_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470207/normal_5fc6cfd96f4a1.pdfIn PDF document text
    • https://site-1178980.mozfiles.com/files/1178980/tap_tap_dash_apk_hack.pdfIn PDF document text
    • https://site-1176402.mozfiles.com/files/1176402/the_last_house_on_the_left_1972_streaming.pdfIn PDF document text
    • https://site-1203255.mozfiles.com/files/1203255/cbse_class_9_science_book_online.pdfIn PDF document text
    • https://site-1173990.mozfiles.com/files/1173990/sql_auth_bypass_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/KvN1Nja/vocopro_dsp_karaoke_mixer.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://s3.amazonaws.com/pazovugal/dragon_ball_z_characters_android_17.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 4972 bytes
SHA-256: 45fecb03191593c2b74bf6e7d74264cb294248307ec74aa63a02bb371b0b3f45
font_01_sfnt_off0000ed53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED53 10380 bytes
SHA-256: b600da0de17091b37c411941ead9add2ecbb62926979bdec54e48d8385bdee21
font_02_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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