Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abfde4f44b0e63f…

MALICIOUS

PDF

149.2 KB Created: 2021-04-02 23:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 369784d5ab5e114e03a509d5241430e3 SHA-1: d8fc8c0d7ddf99310d7abddba601a29e29aedc3e SHA-256: 8abfde4f44b0e63f68ae50484ef040c9261fccdf00b4555ed230b6045d9f055e
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The presence of these links suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9634

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 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.
  • 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://crophysi.ru/123?utm_term=platform+revolution+quotes In PDF document text
    • http://wotodusasesode.iblogger.org/64179916153.pdfIn PDF document text
    • https://woxoxuwavi.weebly.com/uploads/1/3/4/6/134689382/703563.pdfIn PDF document text
    • https://nizovekakajet.weebly.com/uploads/1/3/4/7/134740669/mofaratupajezi.pdfIn PDF document text
    • https://putebofodabisig.weebly.com/uploads/1/3/4/3/134368176/7f751e0aa.pdfIn PDF document text
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/fikovavojomavo.pdfIn PDF document text
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/ribofolikezano.pdfIn PDF document text
    • http://ludoviguboxulu.22web.org/bayly_birth_of_the_modern_world.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/4302228.pdfIn PDF document text
    • https://merelakududeva.weebly.com/uploads/1/3/2/3/132303156/subegu.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/fufolufi.pdfIn PDF document text
    • https://gurovepulebeguj.weebly.com/uploads/1/3/1/1/131163897/5967712.pdfIn PDF document text
    • https://wafifeberir.weebly.com/uploads/1/3/2/6/132682897/1858e83.pdfIn PDF document text
    • https://fozaxuvuten.weebly.com/uploads/1/3/3/9/133986835/22775.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/6692743.pdfIn PDF document text
    • http://sibefumunefeke.iblogger.org/16500900521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wewapozolebupo.epizy.com/56134311407.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/pesimafivuwedunipow.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_684f4b0202d64400ac86b5330d6d2ffd.pdf?index=trueIn PDF document text
    • http://zovagupegi.rf.gd/32711868004.pdfIn PDF document text
    • https://13cfbe10-32e4-4d7a-9072-8dbd3280e6b8.filesusr.com/ugd/994e9e_064cfaece0844ba8912b70100c10f6e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/puxigefebadowazamavamo.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/35764686362.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_0fd80e9e806d4f328dbf4e5064a2bbbd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/74381585032.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_42fd14de79c54163ad90ec8d903d201f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nokiva/jajigibel.pdfIn PDF document text
    • https://d692b82a-d563-45ba-818c-0512d98079dc.filesusr.com/ugd/1c7397_72582c0edab343ccafbc797f8b2b515a.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D700 6656 bytes
SHA-256: e1e55ea60fcd9336cace59dd0d41392dc75d69bddd1ace99e88a55d28c98e8bf
font_01_sfnt_off0001e7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7B3 5100 bytes
SHA-256: 56fad86efc1dcec7d67eeb062a5e29c5122cf6a8927466c46ce5ce3d4e78dc4a
font_02_sfnt_off0001f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8FE 3088 bytes
SHA-256: a9d1f114f6a69690ed533ba20725d4899359f90967cc84083f63c1db4fc1ca67
font_03_sfnt_off000205c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205C2 12332 bytes
SHA-256: 8c7d991c766430d256a0be00af5cf5961ee32cff76b535a2b98cdaec3e826125
font_04_sfnt_off00023017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23017 16140 bytes
SHA-256: 3345b0d77106753ad4ab19a53676392736042f8ff69d0c1f50f05e5b8d9c1f00

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