Malicious PDF — malware analysis report

Static analysis result for SHA-256 10bc29fe25ba319f…

MALICIOUS

PDF

76.4 KB Created: 2021-02-18 23:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eea3fa60a8c8f9492a96628b6456be3e SHA-1: 4848feb0a91d64ba9a88ffd74355276060c3bfa5 SHA-256: 10bc29fe25ba319feac53d4181579aa62ccc1768375ec131a50fab6ce90a22d3
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=why+does+my+energizer+battery+charger+blink'. This, combined with ML classification and ClamAV detection, strongly indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to the malicious URL, suggesting a lure to trick users into clicking the link. No scripts were extracted, but the presence of embedded URLs and the redirector link are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://yafferge.ru/strik?utm_term=why+does+my+energizer+battery+charger+blink In PDF document text
    • https://cdn.sqhk.co/fodibaniwe/dijgfmZ/startup_business_plan_sample_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5ff7df34adb81.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/j5jjieq/basketball_shot_clock_timer_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/ibhhwif/easy_top_up_online_telecom_service.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454052/normal_60068ce6757c4.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/PgcAgg6/6262551535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5fe13970942d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5fdaaefce6aca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472488/normal_6002a686c1f5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482645/normal_6027dccd084c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369327/normal_5fcbce3abf3e7.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/tgis776/19769928132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377400/normal_5fc906b9ce1cf.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/bUhfRja/75072290974.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/vesubodufisi/70324558773.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/87438445556.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/56417542824.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/35808465281.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/tropical_house_2019.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 5720 bytes
SHA-256: 160ee3aaf60e3eefd560d1eea49fb2bb80734e013d11a087126035f0e4497010
font_01_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 10656 bytes
SHA-256: 58885f6bf89d69fdcc0b93cc0ec5e7970b3244dc5f82c6678aded0028b466298

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