Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4b66baf2011ce1…

MALICIOUS

PDF

84.9 KB Created: 2020-12-04 07:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cea8e3746dfcebaf63429ca69c267f84 SHA-1: 0f97804d761f548a6f22d4e91d9f18726933f87c SHA-256: ae4b66baf2011ce1c940560e4b52765a41b92c7e2a0b11eaa59992005a21dc0b
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a PDF link farm. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojanized PDF. Although no scripts were explicitly extracted, the presence of numerous external links points towards an attempt to lure users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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.
  • 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/123?utm_term=brickhouse+rita+williams-ewing In PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/dexepigubedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5fa62d3966efe.pdfIn PDF document text
    • https://jifejajazarig.weebly.com/uploads/1/3/4/3/134307839/9072659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_5fa46315077fc.pdfIn PDF document text
    • https://fanapakukole.weebly.com/uploads/1/3/4/7/134756501/3071003.pdfIn PDF document text
    • https://numokupe.weebly.com/uploads/1/3/4/8/134857704/jumepitofatus_soruvaserad_vezeseb_jinuruvidi.pdfIn PDF document text
    • https://nepejudakolop.weebly.com/uploads/1/3/4/8/134876169/5396674.pdfIn PDF document text
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/220a062c82.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
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52e32dd96f5918e5848d/1606374115700/79844746213.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d45a97599144eedbb2a/1606372682009/zalewexog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5252cb8467722f1ef6e04/t/5fc9644297cced73bdbc3657/1607033922075/zusolixuwirapubulu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17cd088c99b6d37ab4e26/t/5fc9cbde9bc93d20d9af220a/1607060447614/41097306311.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ebe9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEBE9 14772 bytes
SHA-256: 10456a76db4a0e573057e85b3c1566c05b3668fce5a0bf93b34dcc470c99c0c9
font_00_sfnt_off0000d9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E0 5332 bytes
SHA-256: 84a734ed91888ed661b9f15e57a7c16c58c0bc7756ed1361068dd0b0e646b82d
font_02_sfnt_off00011314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11314 10880 bytes
SHA-256: 3423fcc07fd321829a5e96a3740d3ed16b74d3c9e2395f059ddc4f55748ad803
font_03_sfnt_off00013843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13843 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.